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

Example Input: Sentence1: Thank you for confirming that. One more detail: Did you have a particular time period in mind for your trip? Sentence2: I would like to travel on a Saturday. Sentence3: Yes. I want to arrive in Cambridge by 21:30. Sentence4: The Ruskin Gallery is a museum. Do you need anything else? Sentence5: There are numerous places in the Centre, can you tell me what type if place or activity you would like to do and maybe we can narrow it down? Sentence6: The Cambridge University Botanic Gardens are 4 pounds, and the Regency and Ruskin Galleries are free. Sentence7: The address for the regency gallery is 39 fitzroy street and the phone number is 01223365454. For ruskin gallery it's anglia ruskin university, east road, their number is 01245493131. Sentence8: I am looking for a train leaving broxbourne. Sentence9: The centre, please. Sentence10: I should have confirmed that I am indeed going to Cambridge. Sentence11: I need a place to go in town. Sentence12: I'm afraid we don't have a zoo, although if you like plants there is the Cambridge University Botanic Gardens. There are several galleries, such as Regency Gallery and Ruskin Gallery. Sentence13: You are welcome. Have a nice day. Goodbye. Sentence14: That will be all, thank you for your help. Sentence15: No I don't need to book a seat, but can you tell me the departure time. Sentence16: Please, I need the address and phone number for the Regency and Ruskin Galleries. Thanks. Sentence17: TR7846 will get you into Cambridge by 10:32. Would you like me to book a seat on that for you? Sentence18: I can help with that! Your destination will be cambridge I presume, what day would you like to travel? Sentence19: Yes I want to travel on a Saturday. Sentence20: Of course. The departure time for that train is 09:32 with an arrival time of 10:32. It's a 60 minute ride. Anything else I can help with? Sentence21: How about a zoo or art gallery? Sentence22: Where is your destination located? Sentence23: Are there entrance fees to these places? Sentence24: One more thing. Would you confirm the attraction type for the regency gallery and ruskin gallery? Sentence25: There are hourly trains from 5:32 onward. Did you have a particular time of day in mind? Sentence26: Did you have a specific place or area in mind? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Id is TR0625, travel time is 79 minutes and you will arrive by 22:55. Anything else? Sentence2: Actually, could you help find a train as well? To Norwich? Sentence3: I found a train from cambridge to norwich at 05:36 on Friday, will that work? Sentence4: Sunday would be good. Sentence5: No, you've answered all of my questions. Thanks so much for your time. Bye. Sentence6: The Acorn Guesthouse is a 4 star hotel located in the north side of town. It includes free internet and parking. Would you like me to book it for you? Sentence7: I need to leave after 21:30, is there anything closer to that time? Sentence8: Thank you, and thanks again for using our free service. Sentence9: I am trying to find the Acorn Guest House. Sentence10: No, just leave after 21:30. Will you give me the travel time, arrival time and the Train ID? Sentence11: No, thanks. I will go ahead and book it myself. I think I have all the information I need. Thank you. Sentence12: Is there a time you need to arrive by? Sentence13: Yes there are 14 trains. Which day would you like to depart? Sentence14: Thank you for using our service, have a nice day. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Great! Have a nice day! Sentence2: The address is Hills Rd, Cambridge, and the postcode is CB20QQ. Sentence3: Cambridge's hospital is the Addenbrookes Hospital at Hills Rd. Sentence4: Great, can I get the address and postcode. Sentence5: i want to find a hospital in town Sentence6: Thank you for your help. That is all I need today. Question: Who has spoken the sentence 1? (A) User (B) System
Example Output:
Answer: (B) System