answer: Mary won't iron #Person1#'s shirt unless he makes coffee for her.
documents: #Person1#: My shirt needs ironing. Could you please help me with that, Mary?
  #Person2#: No way. Do it yourself.
  #Person1#: Please, I promise this is the last time.
  #Person2#: OK, I'll iron your shirt for you, but only if you make me a cup of coffee.