Anchor: i um have accounting background so then i also have done tax returns in the past and for other people when i worked  for accounting firm
Entailed: I know how to do tax returns from my accounting background.
Contradiction: I don't know to do tax returns.
Contradiction: The woods are on fire.
Contradiction: Bill and Ted were talking to a man in a kimono.
Contradiction: IBM did not have one last year, neither did Rockwell.
Contradiction: People outside walking.