The rules that use the category "<np-gapsout_null-gapsin_null-enemy-sing>" are:

<other_unit-system_utterance-gapsout_pp_gap-gapsin_pp_gap>

<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>

<other_unit-system_utterance-gapsout_null-gapsin_null>

<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>

<other_unit-gapsout_null-gapsin_null>

<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>

<other_unit-system_utterance-controlled_unit-gapsout_np_gap-gapsin_np_gap>

<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>

<other_unit-system_utterance-controlled_unit-gapsout_null-gapsin_null>

<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>

<other_unit-controlled_unit-gapsout_null-gapsin_null>

<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>

<other_unit-system_utterance-gapsout_np_gap-gapsin_np_gap>

<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>