Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: I don't know the address, I'm in Cambridge. Sentence2: Let me know if you need anything else. Sentence3: Addenbrookes Hospital is at Hills Rd, Cambridge, Postcode CB20QQ. The phone number is 01223245151. Is there a specific department you would like to contact? Sentence4: what is your location so i can reach the nearest hospital for you. Sentence5: i just got injured, where is the nearest hospital? Sentence6: No thank you. That is all the information I need. Thanks for your help. Question: Who has spoken the sentence 4? (A) User (B) System
A:
Answer: (A) User