text: Olivier: I'm having a party on Saturday. You're welcome to come!
  Drake: Cool.
  Pam: I'm sorry, I'm out of town.
  Drake: What time should I come?
  Olivier: After 9
  Drake: Do you want me to bring something?
  Olivier: No, thanks. I have everything. 
target: Olivier invites Drake and Pam to the party on Saturday. Pam won't come because she's out of town. Drake will appear after 9 pm.