The category "<vp-system_utterance-base-gapsout_null-gapsin_null-unit>" can be expressed as follows:
<adv> <vp-system_utterance-base-not_mod-gapsout_null-gapsin_null-unit>
<unit_command-system_utterance-gapsout_null-gapsin_null>
<unit_command-system_utterance-gapsout_null-gapsin_null> <conj> <unit_command-system_utterance-gapsout_null-gapsin_null>