The rules that use the category "<cop-sing>" are:
<cop-sing> <np-gapsout_null-gapsin_null-attack-not_wh-sing> <np-gapsout_null-gapsin_null-attack-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-attack-not_wh-sing> <np-gapsout_null-gapsin_null-attack-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-attack-not_wh_or_dummy-sing> <postnommod-attack>
<cop-sing> <np-gapsout_null-gapsin_null-attack-not_wh_or_gq_or_dummy-sing> <postnommod-attack>
<cop-sing> <np-gapsout_null-gapsin_null-breach-not_wh-sing> <np-gapsout_null-gapsin_null-breach-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-breach-not_wh-sing> <np-gapsout_null-gapsin_null-breach-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-compass_direction-not_wh-sing> <np-gapsout_null-gapsin_null-compass_direction-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-compass_direction-not_wh-sing> <np-gapsout_null-gapsin_null-compass_direction-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-enemy-not_wh-sing> <np-gapsout_null-gapsin_null-enemy-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-enemy-not_wh-sing> <np-gapsout_null-gapsin_null-enemy-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-enemy-not_wh_or_dummy-sing> <postnommod-enemy>
<cop-sing> <np-gapsout_null-gapsin_null-enemy-not_wh_or_gq_or_dummy-sing> <postnommod-enemy>
<cop-sing> <np-gapsout_null-gapsin_null-kind-not_wh-sing> <np-gapsout_null-gapsin_null-kind-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-kind-not_wh-sing> <np-gapsout_null-gapsin_null-kind-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_dummy-sing> <postnommod-line_loc>
<cop-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh_or_gq_or_dummy-sing> <postnommod-line_loc>
<cop-sing> <np-gapsout_null-gapsin_null-np_type_all-not_wh-sing> <np-gapsout_null-gapsin_null-np_type_all-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-np_type_all-not_wh-sing> <np-gapsout_null-gapsin_null-np_type_all-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-np_type_null-not_wh-sing> <np-gapsout_null-gapsin_null-np_type_null-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-np_type_null-not_wh-sing> <np-gapsout_null-gapsin_null-np_type_null-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-orientation-not_wh-sing> <np-gapsout_null-gapsin_null-orientation-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-orientation-not_wh-sing> <np-gapsout_null-gapsin_null-orientation-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_dummy-sing> <postnommod-point_loc>
<cop-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh_or_gq_or_dummy-sing> <postnommod-point_loc>
<cop-sing> <np-gapsout_null-gapsin_null-resupply-not_wh-sing> <np-gapsout_null-gapsin_null-resupply-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-resupply-not_wh-sing> <np-gapsout_null-gapsin_null-resupply-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-scale_number-not_wh-sing> <np-gapsout_null-gapsin_null-scale_number-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-scale_number-not_wh-sing> <np-gapsout_null-gapsin_null-scale_number-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-system-not_wh-sing> <np-gapsout_null-gapsin_null-system-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-system-not_wh-sing> <np-gapsout_null-gapsin_null-system-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-unit-not_wh-sing> <np-gapsout_null-gapsin_null-unit-not_wh_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-unit-not_wh-sing> <np-gapsout_null-gapsin_null-unit-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-unit-not_wh_or_dummy-sing> <postnommod-unit>
<cop-sing> <np-gapsout_null-gapsin_null-unit-not_wh_or_gq_or_dummy-sing> <postnommod-unit>
<cop-sing> <np-gapsout_null-gapsin_np_gap-attack-not_wh_or_gq_or_dummy-sing> <postnommod-attack>
<cop-sing> <np-gapsout_null-gapsin_np_gap-enemy-not_wh_or_gq_or_dummy-sing> <postnommod-enemy>
<cop-sing> <np-gapsout_null-gapsin_np_gap-line_loc-not_wh_or_gq_or_dummy-sing> <postnommod-line_loc>
<cop-sing> <np-gapsout_null-gapsin_np_gap-point_loc-not_wh_or_gq_or_dummy-sing> <postnommod-point_loc>
<cop-sing> <np-gapsout_null-gapsin_np_gap-unit-not_wh_or_gq_or_dummy-sing> <postnommod-unit>
<cop-sing> <np-gapsout_null-gapsin_null-attack-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-attack-not_wh-sing> <np-gapsout_null-gapsin_np_gap-attack-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-breach-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-compass_direction-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-enemy-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-enemy-not_wh-sing> <np-gapsout_null-gapsin_np_gap-enemy-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-kind-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-line_loc-not_wh-sing> <np-gapsout_null-gapsin_np_gap-line_loc-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-np_type_all-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-np_type_null-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-orientation-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-point_loc-not_wh-sing> <np-gapsout_null-gapsin_np_gap-point_loc-not_wh_or_gq_or_dummy-sing>
<cop-sing> <np-gapsout_null-gapsin_null-resupply-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-scale_number-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-system-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-unit-not_wh-sing>
<cop-sing> <np-gapsout_null-gapsin_null-unit-not_wh-sing> <np-gapsout_null-gapsin_np_gap-unit-not_wh_or_gq_or_dummy-sing>
<cop-sing> <postnommod-attack>
<cop-sing> <postnommod-line_loc>