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Hello Leonardo, Thank you for your question. To clarify: 1. Yes, we use a possessive 's' for comments made by the colleagues because, in a sense, what is made by someone 'belongs' to them, e.g. Newton's laws. Here the apostrophe comes after the plural 's': ... colleagues' comments. 2. 'movie' is inanimate; therefore it would be better to say: the name of the movie. However, in modern English, this rule is not always followed, so you may also hear 'the movie's name'. I recommend you stick to the rule to be on the safe side.