The rules that use the category "<unit_command-system_utterance-gapsout_null-gapsin_np_gap>" are:

<basic_nl_command-system_utterance-gapsout_null-gapsin_np_gap>

<unit-not_gesture-gapsout_np_gap-gapsin_np_gap-sing> <unit_command-system_utterance-gapsout_null-gapsin_np_gap>