code: def _get_perf(text, msg_id):
      
      msg = KQMLPerformative('REQUEST')
      msg.set('receiver', 'READER')
      content = KQMLList('run-text')
      content.sets('text', text)
      msg.set('content', content)
      msg.set('reply-with', msg_id)
      return msg
docs: Return a request message for a given text.