answer: Dave comes to #Person1#'s party and is introduced to his sister Carol and his ballet teacher Bob.
documents: #Person1#: Hi, Dave. Good to see you could come a long way. Come in.
  #Person2#: Wow. Looks like the party is at a high point.
  #Person1#: Yeah. And they're eating all of my food. Oh, I'd like you to meet my sister, Carol. She's visiting on the weekend.
  #Person2#: Oh. Which one is she?
  #Person1#: She's sitting on the sofa over there.
  #Person2#: You mean the woman with long black hair?
  #Person1#: That's right. Let me introduce her to you. You're both so friendly and adventurous.
  #Person2#: And who's the man sitting next to her? Uh, the man wearing the suit jacket?
  #Person1#: Oh, that's Bob, my ballet teacher.
  #Person2#: Ballet teacher! I never knew you could do ballet.
  #Person1#: I started about two months ago. Come on. I'd like you to meet them.
  #Person2#: I'm coming.