The category "<breach_command-gapsout_null-gapsin_np_gap>" can be expressed as follows:
<breach_command-gapsout_np_gap-gapsin_np_gap> <breach_mod-gapsout_null-gapsin_np_gap>
<breach_command-gapsout_null-gapsin_np_gap> <breach_mod-gapsout_null-gapsin_null>