You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Example Input: Sentence1: I'd like to find a train going to Cambridge that leaves on Sunday. Sentence2: Okay. It's a 3-star guesthouse in the north area with no internet or parking. Is there more you would like to hear? Sentence3: I would be leaving from Peterborough. I need to arrive in Cambridge by 19:30 though. Sentence4: My departure time is flexible. Sentence5: The earliest train is TR3782 which leaves at 05:19, would you like me to book some tickets for you? Sentence6: That sounds great. Can I just get the postcode please? Sentence7: No, I believe that is everything. Thank you. Sentence8: I am also looking for a hotel called alpha-milton guest house. Sentence9: Ok, and where are you departing from? Sentence10: No, that won't be necessary. I would like to get the price, though. Sentence11: Not a problem, please contact us again if you need any further assistance. Sentence12: Of course. The price for the train running from peterborough to cambridge on Sunday is 13.20 pounds. Is there anything else I can assist you with? Sentence13: The post code of the alpha-milton guest house is cb41xa. Is there anything else I can assist you with today? Sentence14: Okay, there are a few trains available. What time would you like to depart? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I need to find a hospital nearby that has a hepatobillary and gastrointestinal surgery referral center Sentence2: No, that's it. Thanks! Sentence3: No, I just need the postcode. Sentence4: You're very welcome. Have a great day! Sentence5: Certainly. The postcode is CB20QQ. Anything else I can help you with today? Sentence6: Addenbrookes Hospital located at Hills Rd, Cambridge has that department. Would you like the phone number to that direct department? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Where will you be departing from? Sentence2: Thank you, that sounds good! Could you let me know how much it costs? Sentence3: I would recommend train ID TR8542 which departs Cambridge at 10:36 and arrives in Norwich at 11:55. There are a few earlier options as well. Sentence4: Where will you be headed on Tuesday? Sentence5: Their address is 98 king street and they have free admission. Can I help you with anything else? Sentence6: Sure! The cost is 17.60 Sentence7: Thanks for using our service have a good day. Bye. Sentence8: I need to head to norwich Sentence9: There are lots of attractions in Cambridge, do you have any specific activities in mind? Sentence10: No, you have been extremely helpful already. I am all set. Thanks. Bye. Sentence11: Hi, yes, I am looking for a train leaving on Tuesday that will arrive by 12:30. Sentence12: I will be departing from Cambridge. Sentence13: I would like something in the Centre if possible. Perhaps a gallery? Sentence14: Could you let me know the address and how much it costs? Sentence15: Excellent. I also need a place to go in town. Sentence16: How about broughton house gallery? Question: Who has spoken the sentence 8? (A) User (B) System
Example Output:
Answer: (A) User