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

Example Input: Sentence1: Could you check the spelling(city centre north b and b) and try to search again? Sentence2: The TR2512 takes 51 minutes. Anything else you need? Sentence3: I will be traveling on Thursday. Sentence4: It is a cheap, 0 star guesthouse located at 328a histon road on the north side. It has free internet and parking. Phone number and postcode are 01223312843 and cb43ht. Sentence5: Yes I am looking for information on a hotel called City Center North B and B. Sentence6: Sure! give me the following information: Day of visit, number of people and number of days that you will be staying. Sentence7: I cannot find that hotel. Any other hotels you would like to find? Sentence8: You're all set. Your reference number is HOSVDEGA . Can I help you with anything else today? Sentence9: Do you have a time preference? Sentence10: Well that will not work. Sentence11: I need to arrive by 14:15. Sentence12: there are many trains but you need to tell us which day you want to travel Sentence13: I am also looking for a train into Cambridge from London Kings Cross. Sentence14: Please book for 2 people starting on thursday for 4 nights. Sentence15: enjoy your stay in Cambridge! Sentence16: The TR2512 will fit your needs. Would you like to book this train? Sentence17: The first train leaves at 5:17. Sentence18: Thank you. Are you able to book that for me? Sentence19: Not at this time. What is the travel time for that train, please? Sentence20: no that will be all thanks Question: Who has spoken the sentence 19? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I'm looking for an expensive restaurant in the center of town. Sentence2: Certainly. When would you like your taxi to depart? Sentence3: Is there any Turkish cuisine? If so I need the postcode and the address. Sentence4: No, that will be all, thank you! Sentence5: I need to arrive at Cambridge Contemporary Art by 19:15 please. Sentence6: Okay, have a nice day. Sentence7: I don't really care, what do you recommend? I will need the postcode and entrance fee please. Sentence8: I am also looking for museums in the area. Sentence9: How about Cambridge Contemporary Art? The entrance is free and the postcode is cb21su. Enjoy! Sentence10: There are many museums listed in the centre area, what kind of museum are you interested in? Sentence11: No problem. Your taxi has been reserved. Your driver's contact number is 07035811281 and will be driving a grey toyota. Is there anything else you need today? Sentence12: Thank you. I would also like a taxi to commute between the two places. Sentence13: There are many expensive restaurants in the centre of town, is there a specific type of food you would like? Sentence14: The Meze Bar restaurant matches your tastes. It is located at 196 Mill Road City Centre. The postcode is cb13nf. Question: Who has spoken the sentence 10? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: That will be all. Thank you so much. Sentence2: The address for Tenpin is cambridge leisure park, clifton way in postcode cb17dy. Is there anything else I can do for you today? Sentence3: Is there a specific type of attraction you are looking for? Sentence4: You have a reservation at Restaurant Alimentum. Your reference number is JBVUMN45 . Sentence5: Tenpin is located at cambridge leisure park, clifton way. The entrance fee is unlisted. Sentence6: I need an address for the cambridge leisure park. Sentence7: I would like to find some entertainment in the same area as well. Sentence8: I'm sorry I can't find any price listings. Can I help you find something else? Sentence9: I see both an Italian and a Modern European restaurant in that area in your price range. Which would you prefer? Sentence10: I am looking for something entertaining please. Sentence11: Is there another one that tells you how much it is? Sentence12: Can you please recommend one and give me their address and entrance fee? Sentence13: I need a restaurant in the south that is moderately priced. Sentence14: any will be fine with me. book a table for 8 at 15:15 on monday Sentence15: Your welcome. Have a lovely stay! Sentence16: There are two entertainments: nusha and tenpin. Do you want more information about either one? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output:
Answer: (B) System