The rules that use the category "<use_verb>" are:

<utterance-last_state_nlb3-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb4-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb5-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb6-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb7-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb8-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb1-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb9-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_nlb2-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>

<utterance-last_state_command-discourse_user_response-air>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_dummy>

<use_verb> <np-gapsout_null-gapsin_null-not_wh_or_gq_or_dummy>