    Sentence 1: As the double-decker boats  get ready to leave the pier, bells ring,  the gangplank is raised, deckhands in  blue sailor suits man the hawsers, and a  couple of hundred, commuters begin a  seven-minute sightseeing tour.    Sentence 2: You will know when the boats  jare ready to leave when the bells ring  land the gangplank is. raised    