You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: What are the phone numbers for these colleges? Sentence2: Tell me what colleges are in the west side of town Sentence3: Have a great day! Sentence4: Churchill college's phone number is 01223336233. Sentence5: That's it. Thanks! Sentence6: There are 5 colleges on the west side. Two have free entrance and two cost 2.50 pounds. Is there anything else i can help you with? Question: Who has spoken the sentence 4? (A) User (B) System
Output:
Answer: (A) User