Sentence 1: Amy worked at home and asked questions in a chat room. 
 Sentence 3: An hour later someone else asked the same question in the chat room 
 Sentence 4:  Since the supervisor was gone for the night Amy answered the question 
 Sentence 5:  The coworker thanked Amy profusely for helping with a hard caller 
 Given Sentence 2: A caller hung up on her as she awaited an answer.