Hi!<br/><br/>Robbie's whereabout.<br/><br/>I don't know Robbie's whereabout.<br/><br/>or<br/><br/>Robbie whereabout.<br/><br/>I don't know Robbie whereabout.<br/><br/>1. Whether it is a title or in a sentence, do we use apostrophe after the subject's name or not? <br/><br/>2. Should we put "s" after whereabout?<br/><br/>Thank you so much!