The category "<other_unit-system_utterance-gapsout_null-gapsin_null>" can be expressed as follows:

<other_unit-system_utterance-gapsout_null-gapsin_null>

<det-num_all-not_wh_or_gq_or_dummy> <unit_nom-not_det-num_all>

<det-pl-not_wh_or_dummy> <unit_nom-not_det-pl>

<det-pl-not_wh_or_gq_or_dummy> <unit_nom-not_det-pl>

<det-sing-not_wh_or_gq_or_dummy> <unit_nom-not_det-sing>

<dynamic_unit_other_unit>

<dynamic_vehicle_other_unit>

<force> <full_unit_call_sign>

<full_unit_call_sign>

<gesture_unit>

<np-gapsout_null-gapsin_null-attack-num_all> <np-gapsout_null-gapsin_null-attack-not_wh_or_dummy-num_all>

<np-gapsout_null-gapsin_null-attack-num_all> <np-gapsout_null-gapsin_null-attack-not_wh_or_gq_or_dummy-num_all>

<np-gapsout_null-gapsin_null-attack-pl> <np-gapsout_null-gapsin_null-attack-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-attack-pl> <np-gapsout_null-gapsin_null-attack-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-attack-sing> <np-gapsout_null-gapsin_null-attack-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-attack-sing> <np-gapsout_null-gapsin_null-attack-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-breach-pl> <np-gapsout_null-gapsin_null-breach-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-breach-pl> <np-gapsout_null-gapsin_null-breach-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-breach-sing> <np-gapsout_null-gapsin_null-breach-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-breach-sing> <np-gapsout_null-gapsin_null-breach-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-compass_direction-pl> <np-gapsout_null-gapsin_null-compass_direction-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-compass_direction-pl> <np-gapsout_null-gapsin_null-compass_direction-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-compass_direction-sing> <np-gapsout_null-gapsin_null-compass_direction-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-compass_direction-sing> <np-gapsout_null-gapsin_null-compass_direction-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-enemy-num_all> <np-gapsout_null-gapsin_null-enemy-not_wh_or_dummy-num_all>

<np-gapsout_null-gapsin_null-enemy-num_all> <np-gapsout_null-gapsin_null-enemy-not_wh_or_gq_or_dummy-num_all>

<np-gapsout_null-gapsin_null-enemy-pl> <np-gapsout_null-gapsin_null-enemy-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-enemy-pl> <np-gapsout_null-gapsin_null-enemy-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-enemy-sing> <np-gapsout_null-gapsin_null-enemy-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-enemy-sing> <np-gapsout_null-gapsin_null-enemy-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-kind-pl> <np-gapsout_null-gapsin_null-kind-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-kind-pl> <np-gapsout_null-gapsin_null-kind-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-kind-sing> <np-gapsout_null-gapsin_null-kind-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-kind-sing> <np-gapsout_null-gapsin_null-kind-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-line_loc-num_all> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_dummy-num_all>

<np-gapsout_null-gapsin_null-line_loc-num_all> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_gq_or_dummy-num_all>

<np-gapsout_null-gapsin_null-line_loc-pl> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-line_loc-pl> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-line_loc-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-line_loc-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-np_type_all-num_all> <np-gapsout_null-gapsin_null-np_type_all-not_wh_or_dummy-num_all>

<np-gapsout_null-gapsin_null-np_type_all-num_all> <np-gapsout_null-gapsin_null-np_type_all-not_wh_or_gq_or_dummy-num_all>

<np-gapsout_null-gapsin_null-np_type_all-sing> <np-gapsout_null-gapsin_null-np_type_all-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-np_type_all-sing> <np-gapsout_null-gapsin_null-np_type_all-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-np_type_null-pl> <np-gapsout_null-gapsin_null-np_type_null-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-np_type_null-pl> <np-gapsout_null-gapsin_null-np_type_null-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-np_type_null-sing> <np-gapsout_null-gapsin_null-np_type_null-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-np_type_null-sing> <np-gapsout_null-gapsin_null-np_type_null-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-orientation-pl> <np-gapsout_null-gapsin_null-orientation-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-orientation-pl> <np-gapsout_null-gapsin_null-orientation-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-orientation-sing> <np-gapsout_null-gapsin_null-orientation-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-orientation-sing> <np-gapsout_null-gapsin_null-orientation-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-point_loc-num_all> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_dummy-num_all>

<np-gapsout_null-gapsin_null-point_loc-num_all> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_gq_or_dummy-num_all>

<np-gapsout_null-gapsin_null-point_loc-pl> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-point_loc-pl> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-point_loc-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-point_loc-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-resupply-pl> <np-gapsout_null-gapsin_null-resupply-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-resupply-pl> <np-gapsout_null-gapsin_null-resupply-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-resupply-sing> <np-gapsout_null-gapsin_null-resupply-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-resupply-sing> <np-gapsout_null-gapsin_null-resupply-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-scale_number-pl> <np-gapsout_null-gapsin_null-scale_number-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-scale_number-pl> <np-gapsout_null-gapsin_null-scale_number-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-scale_number-sing> <np-gapsout_null-gapsin_null-scale_number-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-scale_number-sing> <np-gapsout_null-gapsin_null-scale_number-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-system-sing> <np-gapsout_null-gapsin_null-system-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-system-sing> <np-gapsout_null-gapsin_null-system-not_wh_or_gq_or_dummy-sing>

<np-gapsout_null-gapsin_null-unit-num_all> <np-gapsout_null-gapsin_null-unit-not_wh_or_dummy-num_all>

<np-gapsout_null-gapsin_null-unit-num_all> <np-gapsout_null-gapsin_null-unit-not_wh_or_gq_or_dummy-num_all>

<np-gapsout_null-gapsin_null-unit-num_null> <np-gapsout_null-gapsin_null-unit-not_wh_or_dummy-num_null>

<np-gapsout_null-gapsin_null-unit-num_null> <np-gapsout_null-gapsin_null-unit-not_wh_or_gq_or_dummy-num_null>

<np-gapsout_null-gapsin_null-unit-pl> <np-gapsout_null-gapsin_null-unit-not_wh_or_dummy-pl>

<np-gapsout_null-gapsin_null-unit-pl> <np-gapsout_null-gapsin_null-unit-not_wh_or_gq_or_dummy-pl>

<np-gapsout_null-gapsin_null-unit-sing> <np-gapsout_null-gapsin_null-unit-not_wh_or_dummy-sing>

<np-gapsout_null-gapsin_null-unit-sing> <np-gapsout_null-gapsin_null-unit-not_wh_or_gq_or_dummy-sing>