answer: #Person2# helps #Person1# buy four pounds of the extra-lean ground beef.
documents: #Person1#: I need to get some beef. 
  #Person2#: Do you know what kind of beef you want? 
  #Person1#: I want to get some ground beef. 
  #Person2#: How many pounds do you need? 
  #Person1#: I would like four pounds of ground beef. 
  #Person2#: What kind of ground beef do you need? 
  #Person1#: I would like the extra lean. 
  #Person2#: Let me go and get that for you. 
  #Person1#: Thank you very much. 
  #Person2#: No problem. I'll wrap it up for you now. 
  #Person1#: I appreciate that.