answer: Dave comes to #Person1#'s party and #Person1# introduces Carol, #Person1#'s sister, and Bob, #Person1#'s karate teacher, to Dave.
documents: #Person1#: Hi Dave. [Hi] Happy to see you could make it. Come on in.
  #Person2#: Wow. Looks like the party is in full swing.
  #Person1#: Yeah. And they're eating me out of house and home. Oh, I'd like you to meet my sister, Carol. She's visiting for the weekend.
  #Person2#: Oh. Which one is she?
  #Person1#: She's sitting on the sofa over there.
  #Person2#: You mean the woman wearing the red sweater with the long black hair?
  #Person1#: Yeah. That's right. Let me introduce you to her. I just know you two will hit it off. You're both so outgoing and adventurous.
  #Person2#: Uh, and who's the man sitting next to her? Uh, the man with the suit jacket and flashy green tie?
  #Person1#: Oh, that's Bob, my karate teacher.
  #Person2#: Karate teacher! I never knew you were into karate.
  #Person1#: Yeah, I started about two months ago. Come on. I'd like you to meet them.