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'm looking for a train that departs cambridge on saturday. Any ideas? Sentence2: I would like to leave after 16:30 and would like to go to kings lynn. Sentence3: Yes please and I'll also need the postcode. Sentence4: I am not showing any hotels with 1 star that have free parking, would you like to look for something else? Sentence5: We have three 4 star hotels that provide free internet and free parking. Is there an area you would prefer to stay at? Sentence6: the postcode is cb236bw. it is a hotel in the cheap price range. when would you like to stay from, how many people, and for how long? Sentence7: Alright, are there any 1 star hotels that offer free parking? Sentence8: There are 202 trains that leave Cambridge on Saturday. Sentence9: I recommend The Cambridge Belfry, a cheap 4-star hotel on the west side. Would you like to reserve a room? Sentence10: I'm interested in the earliest one. What is the train ID? Sentence11: Sorry, no, I do not see any one star hotels with free wifi. Would you like to try another option? Sentence12: That's the TR2840. Sentence13: That was all I needed. Thank you. Sentence14: Are there any with 4 stars? Sentence15: There are 7 trips that would work. The earliest leaves at 17:11 and the latest leaves at 23:11. The train ride will be 47 minutes. What would you prefer? Sentence16: The cambridge belfry is a hotel, not a guesthouse. May I help with something else? Sentence17: Does any of them have free wifi? Sentence18: You're welcome! Have a great day. Sentence19: I need the postcode, hotel type, and price range for The Cambridge Belfry. Sentence20: I need more information on the number of nights and people. Sentence21: Any place is fine, I go with whatever you recommend. Sentence22: Forget about booking it, just please tell me what type of hotel it is. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I'd like to find a 4 star guesthouse, please. Sentence2: The Place is a great nightclub in the south, located at 22 sidney street, post code cb23hg. The phone number is 01223324600. Is there anything else I can help you with? Sentence3: Yes, book it for me please. Thank you. Sentence4: It does not really matter. It will be just me starting on Friday for 3 nights. Sentence5: What attractions do you have in the south? Sentence6: I have found 18 guesthomes that match the criteria you listed. Is there any other specifications you have about the guesthouse (area,price range,etc) that you would like to tell me? Sentence7: Unfortunately, the booking was unsuccessful. Would you like to shorten your stay or try another place to stay? Sentence8: arbury lodge guesthouse is a moderately priced guesthouse in the north. How does that sound? Sentence9: The arbury lodge guesthouse is in the moderate price range. Sentence10: We have 8 types of attractions in the south? What type are you looking for? Sentence11: Sure, is there an area you prefer? Sentence12: I have to have free wifi Sentence13: I would like a room that is close to the nightclub for atleast 1 night up to 3 nights? Sentence14: Hmm, I'm not really sure. Do you happen to have any nightclubs? If not, what are my choices? Question: Who has spoken the sentence 6? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I'm sorry, the only moderately priced hotel does not have free parking. However, there is a 4 star inexpensive hotel that has both free wifi and parking? Sentence2: There are 7 guest houses and 2 hotels that are in the north in the moderate price range. Do you have a preference for type or number of stars? Sentence3: Ok, and what day would you be traveling? Sentence4: Thank you for you help> Sentence5: Not right now, but I do need the travel time and fare, please. Sentence6: Sure, do you have a specific price range in mind? Sentence7: What time would you like to depart Peterborough? Sentence8: in the moderate price range please with free parking Sentence9: I need a place to stay while I'm in Cambridge. Can you recommend some place in the centre of town? Sentence10: I want to leave after 11:45. Sentence11: The travel time is 50 minutes and the fare is 13.20 pounds. Can I help you with anything else? Sentence12: Sunday, thank you. Sentence13: I'll take the first one you have listed, and I need to know the star rating, phone number, and postcode please. Sentence14: The acorn guest house meets your criteria. It is 4 stars, phone number 0122335388, and postcode is cb41da. Shall I book a room for you? Sentence15: You are very welcome! Have a safe travel! Sentence16: How about one in the north area? Sentence17: Train TR9345 leaves at 12:19 and arrives at 13:09. Would you like to book it? Sentence18: No I just needed that information. I am also looking for a train from Peterborough to Cambridge. Sentence19: Not a problem at all. Sentence20: That was all, thank you for your help today! Question: Who has spoken the sentence 13? (A) User (B) System
Example Output:
Answer: (B) System