conversations.from: human
conversations.value: Nancy can hula hoop for 10 minutes.  Casey can hula hoop 3 minutes less than Nancy.  Morgan can hula hoop three times as long as Casey.  How long can Morgan hula hoop?
  What is the solution?
conversations.from: assistant
conversations.value: Casey can hula hoop 3 minutes less than Nancy so she can hula hoop for 10-3 = 7 minutes
  Morgan can hula hoop three times as long as Casey, who can hula hoop for 7 minutes, so she can hula hoop for 3*7 = 21 minutes