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

<nlb-careful>

<abort_verb> nine line brief

<nlb-nlb2>

<abort_verb> nine line brief

<nlb-nlb6>

<abort_verb> nine line brief

<nlb-not_command_or_system_utterance_or_user_response>

<abort_verb> nine line brief

<nlb-nlb3>

<abort_verb> nine line brief

<nlb-nlb7>

<abort_verb> nine line brief

<nlb-nlb4>

<abort_verb> nine line brief

<nlb-nlb8>

<abort_verb> nine line brief

<nlb-nlb1>

<abort_verb> nine line brief

<nlb-nlb5>

<abort_verb> nine line brief

<nlb-nlb9>

<abort_verb> nine line brief