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

<system_operation-command-gapsout_null-gapsin_null>

<attach_unit_operation-gapsout_null-gapsin_null>

<cancel_operation-command-gapsout_null-gapsin_null>

<change_grammar_operation>

<create_operation-gapsout_null-gapsin_null>

<display_control_operation-gapsout_null-gapsin_null>

<h_hour> is <time_point_name>

<h_hour> is now

<locate_operation-gapsout_null-gapsin_null>

<name_operation-gapsout_null-gapsin_null>