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: Thank you, what is their phone number? Sentence2: The phone number is 01223358966. Sentence3: It's address is Parkside, Cambridge with Postcode CB11JG Sentence4: Where is the Parkside Police Station? Question: Who has spoken the sentence 1? (A) User (B) System
Output:
Answer: (B) System