before_sent:  We  find that these "tails" are the major cause of anisotrpy of the vector space.
before_sent_with_intent: <meaning-changed>  We  find that these "tails" are the major cause of anisotrpy of the vector space.
after_sent:  We introduce a new neuron-level method to analyze where these "tails" come from. We find that these "tails" are the major cause of anisotrpy of the vector space.