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: the missing sock serves international food, they are located at Finders Corner Newmarket Road. Sentence2: Bye bye. Sentence3: Thanks, see ya! Sentence4: I'd like a cheap restaurant in the east part of town. Sentence5: You're welcome. Good bye, and please come back to the Cambridge restaurant system if you need further assistance. Sentence6: May I have the street address of the establishment. Sentence7: What type of food is served at the Missing Sock, and what is the address? Sentence8: The address for The Missing Sock is Finders Corner Newmarket Road. Would you like their phone number or postcode? Sentence9: What is the address? Sentence10: Their address is Finders Corner Newmarket Road. Sentence11: The Missing Sock serves cheap food in the East part of town. Sentence12: Thank you. Goodbye. Question: Who has spoken the sentence 11? (A) User (B) System
Output:
Answer: (B) System