text: David: hey bro, can you do this quick survey for me? It only takes 5 minutes <file_other>
  Patrick: sure... why do you need it?
  David: it's for my masters thesis, I need research results so I can write about them
  Patrick: you owe me one, when my time comes :D
  David: deal mate!
target: Patrick will do a short survey for David's masters thesis.