You will be given a definition of a task first, then some input of the task.
You are given a dialog between 2 or more individuals. Within the dialog, there will be clues that indicate two individuals were or are dating. You will be prompted at the end to answer which Speaker (or named individual) is dating which other Speaker (or named individual).

Speaker 1: I mean if you think about it, I mean Ross did learn something from each marriage. 
Speaker 2: How to make the next one even shorter? 
Speaker 1: Now wait a minute that's not fair. He was married to me a hell of a lot longer than he was married to Emily, he just didn't tell me. Maybe I have to pee again. 
Speaker 2: Well, this is fun. So Ross, did you kill any of these wives? 
Speaker 3: Y'know what? I-I-I... I-I have had enough of this! Y'know, I-I-I care a great deal about your daughter and I have treated her with nothing but respect! So if-if you've got a problem with me, frankly... 
Speaker 2: Are you yelling at me?! 
Speaker 3: God no! 
Speaker 4: Y'know what daddy? If you don't like Ross, that's fine. It doesn't matter to me, I'm gonna go out with him anyway. 
Speaker 2: Really?! 
Speaker 3: Well if it doesn't matter to her, it doesn't matter to me! Still not yelling! 
Speaker 2: Wow. What can I say? This doesn't make me like you any better! 
Speaker 3: That's okay, I'm not so crazy about myself right now either. 
Speaker 2: Then we agree? 
Speaker 3: Uh yeah, I guess-Yeah! I guess so. 
Speaker 2: Neither of us like Ross! 
Speaker 4: I like Ross. 
Speaker 3: Ohhh! Kids! 
Speaker 1: Wait-wait-wait, I just thought of another story about how nice Ross is! 
Speaker 3: That's okay Rach, we're not liking Ross right now. 
Speaker 1: Oh! I've got a lot of those too! Speaker 3 is or was dating which Speaker?
Output:
Speaker 4