#durative_aspect__durative  the aspect of a verb that expresses its duration
  supertype:  #aspect.grammatical_relation  the beginning or duration or completion or repetition of the action of a verb
  subtype:  #imperfective_aspect__imperfective  aspect without regard to the beginning or completion of the action of the verb
  subtype:  #progressive_aspect__progressiveaspect  the aspect of a verb that expresses its on-going action

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