Dear Kazuki, technically, both sentences are correct. The difference is hard to tell, without having any context around. "Sie kommt aus dem Kino." Means: she is coming out of the cinema-building. So she was in there. "Sie kommt vom Kino." may mean: a) same as above; b) if you are talking about a person, his/her background, profile, etc.: her professional background is cinema, not (as examples) theatre or radio. c) it could, I think, also mean: she is approaching from the direction of the cinema (and not the post-office or whatever building is on the other side of the road). Conclusion: Only context can tell whether one of the sentences may be better than the other or even wrong, or, what it actually means in the text available. Hope I could help.