text: Pandora: When was the math test?
  Olivia: What???
  Iris: Yesterday
  Olivia: Are you serious?
  Olivia: There was a math test??
  Pandora: I heard from Susan
  Iris: It was yesterday
  Iris: It wasn't that difficult 
  Olivia: I didn't know!!!
  Olivia: What should I do now?
  Pandora: Talk to the teacher
  Olivia: I was sick 
  Olivia: When did she announce it?
  Iris: On Monday
target: There was a math test yesterday. Olivia didn't know because she was sick. The teacher announced it on Monday. 