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

<recover_command-system_utterance-gapsout_null-gapsin_np_gap>

<recover_verb-not_located> <objective_mod-gapsout_null-gapsin_null>

<recover_command-gapsout_null-gapsin_null>

<recover_verb-not_located> <other_unit-gapsout_null-gapsin_null> <objective_mod-gapsout_null-gapsin_null>

<fire_modification_command>

<change_action_verb> <fire_word> <objective_mod-gapsout_null-gapsin_null>

<recover_command-user_response-gapsout_null-gapsin_null>

<recover_verb-not_located> <other_unit-user_response-gapsout_null-gapsin_null> <objective_mod-gapsout_null-gapsin_null>

<move_mod-gapsout_null-gapsin_null-not_compass_direction>

<objective_mod-gapsout_null-gapsin_null>

<recover_command-discourse_all-gapsout_null-gapsin_null>

<recover_verb-not_located> <other_unit-discourse_all-gapsout_null-gapsin_null> <objective_mod-gapsout_null-gapsin_null>

<recover_command-system_utterance-gapsout_null-gapsin_null>

<recover_verb-not_located> <other_unit-system_utterance-gapsout_null-gapsin_null> <objective_mod-gapsout_null-gapsin_null>

<recover_command-command-gapsout_null-gapsin_np_gap>

<recover_verb-not_located> <objective_mod-gapsout_null-gapsin_null>

<recover_command-command-gapsout_null-gapsin_null>

<recover_verb-not_located> <other_unit-command-gapsout_null-gapsin_null> <objective_mod-gapsout_null-gapsin_null>

<recover_command-user_response-gapsout_null-gapsin_np_gap>

<recover_verb-not_located> <objective_mod-gapsout_null-gapsin_null>

<resupply_command>

<tailgate_resupply> <objective_mod-gapsout_null-gapsin_null>