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

<unit_command-gapsout_null-gapsin_null>

<basic_unit_command-gapsout_null-gapsin_null>

<basic_unit_command-gapsout_null-gapsin_null> <temporal_control_method-final>

<control_method> <basic_unit_command-gapsout_null-gapsin_null>