The rules that use the category "<engagement_loc-gapsout_null-gapsin_null>" are:

<objective_mod-gapsout_null-gapsin_null>

<to_prep> <engagement_loc-gapsout_null-gapsin_null>

<engagement_loc_mod-gapsout_null-gapsin_null>

<location_prep> <engagement_loc-gapsout_null-gapsin_null>

<control_measure_clause>

<unit-gapsout_null-gapsin_null> <reach_verb> <engagement_loc-gapsout_null-gapsin_null>

<postnommod-attack>

<on_prep> <engagement_loc-gapsout_null-gapsin_null>