Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: Clare College is on Trinity Lane. The entrance fee is 2.50 pounds. Is there anything else I can assist you with today? Sentence2: I need a train to cambridge. Get me one that arrives by 13:00 Sentence3: clare college is a college located in the west Sentence4: They all do. Which train would you like? Sentence5: Can I also have the address and entrance fee? Sentence6: I am going to Cambridge and should arrive by 13:00. Can you book for 3 people leaving Wednesday from Peterborough? Also need information on Clare College. Sentence7: i am leaving peterborough Sentence8: Are you going to cambridge or ely? You've said both. Sentence9: I'd like one that arrives by 13:00 on wednesday. Sentence10: all set! Reference # is EH4ICTHP . Anything else today? Sentence11: Well pick pick the one that leaves the latest but arrives by 13:00 and book for 3 people. Sentence12: great, have a good day! Sentence13: No, that is all for today. Sentence14: I will be going to Ely on Thursday. Sentence15: too many options to choose from, can you please help narrow them down? Sentence16: I still have 14 trains. Arriving at :09 and :38 every hour starting at 06:09 and the last is at 12:38. Which one do you want? Sentence17: There are over 500 results. Where are you leaving from? And what day? Sentence18: Yes, I need information on clare college. Question: Who has spoken the sentence 12? (A) User (B) System
Output:
Answer: (A) User