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

Ex Input:
Sentence1: Frankie and Bennys serves italian food in the expensive price range, and their postcode is cb17dy. Would you like assistance in making a reservation? Sentence2: Departure time doesn't matter, I just need to arrive at the stansted airport by 21:30 on Thursday, and I need to depart from Cambridge. Sentence3: When are you leaving? Sentence4: I don't need tickets at the moment, but I do need the price and train ID for that 19:40 departure, please. Sentence5: I need a train that leaves Cambridge on Thursday. Sentence6: There are 202 trains leaving Cambridge on Thursday. Would you like to narrow your search by destination and time? Sentence7: Can you tell me the postcode, food type, and the price range? Sentence8: The train id for that is TR9030 and the price is 10.10 pounds. Is there anything else you'd like help with today? Sentence9: I am going to the stansted airport and I need to arrive by 21:30. Sentence10: Yes, the 19:40 train will arrive at 20:08. How many tickets would you like? Sentence11: I'm also looking for a particular restaurant, it's called Frankie and Benny's. Sentence12: Thank you for contacting the Cambridge TownInfo centre. We're here any time you need to get around Cambridge! Sentence13: No, that's all I needed. Thank you. Sentence14: Can I please have one at 19:40. I will get there by 21:30 correct? Sentence15: I was able to find it, what information would you like on it? Sentence16: I have 16 train departures fitting your preferences. They leave every :40 of the hour starting at 5:40 to 20:40, would you like me to book one of these? Question: Who has spoken the sentence 10? (A) User (B) System

Ex Output:
Answer: (A) User

Ex Input:
Sentence1: I have 23 places. What area would you prefer to be in? Sentence2: There is Cafe Jello Gallery in the west, Cambridge Artworks in the east and Broughton House Gallery in the centre. Does any of those sound appealing? Sentence3: Just the price range and postal code please. Sentence4: Cafe jello gallery postcode is cb30af and the entrance is free, is there anything else I can do for you? Sentence5: Here is the address 529 Newmarket Road Fen Ditton. Sentence6: Do you have an attraction type preference? Sentence7: You're welcome! Enjoy your visit! Sentence8: that is it. thank you for helping me Sentence9: Yes, I would like to see a museum. Can you tell me the postcode and entrance fee for it? Sentence10: I have no particular area preference. Can you list a few for me to select from? Sentence11: Yes could I have their postcode and entrance fee? Sentence12: Can you give me more information about Yu Garden. Sentence13: Of course! It is a chinese cuisine restaurant located in the east. Anything else you would like to know? Sentence14: I am traveling to Cambridge and excited about seeing local tourist attractions, can you help? Sentence15: I am also looking for the restaurant Yu Garden. Sentence16: Their price range is expensive and the postcode is cb58pa. Are you sure that is all you needed? Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System

Ex Input:
Sentence1: The arrival time of the train TR9937 from cambridge to norwich will be same Thursday by 22:55. Is that okay with you? Sentence2: ok, the TR9937 leaves at 21:36 Sentence3: How many tickets do you need? Sentence4: i am also looking for a guest house called a and b guest house. Sentence5: The A and B Guesthouse is a moderately priced 4 star guesthouse in the east. It has free internet, but no parking. Would you like me to book it for you? Sentence6: sure thing, they are located at 124 tension road Sentence7: Is there anything else I can assist you with today? Sentence8: This trip is for 79 minutes and costs 17.60 pounds. Would you like me to book this for you? Sentence9: What is the total travel time for this trip? Sentence10: Okay great. Thanks for calling. Sentence11: I need a train to Norwich, leaving after 21:30. Sentence12: No, that is all I need today. Thank you. Sentence13: I'll be leaving from Cambridge Sentence14: Yes if you could book it that would be great. Sentence15: OK! Do you have all the information you need? Sentence16: I just need the address. Sentence17: Great, thanks so much! Sentence18: On what day will you be traveling on? Sentence19: I am leaving on Thursday. Sentence20: Where are you departing from please? Sentence21: What would be the arrival time of that train? Sentence22: I don't need any reservations today just information. Question: Who has spoken the sentence 17? (A) User (B) System

Ex Output:
Answer: (B) System