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

Example Input: Sentence1: Enjoy your travels! Let us know if we can be of any further assistance. Sentence2: TR8143 departs at 14:11 and arrives in Cambridge by 14:58, does this suit your needs? Sentence3: I need a train leaving from kings lynn. Sentence4: Yes, I'd like to travel on Wednesday, and I'd like to arrive in Cambridge no later than 15:30. Sentence5: There are no nightclubs in the west. Would you like to try another area? Sentence6: There are 133 trains leaving Kings Lynn, do you have a particular day you are traveling? Sentence7: They have free entrance. Their postcode is cb30ds. Sentence8: Could you look up a college instead then? Sentence9: I'm glad I could help. Sentence10: Churchill college is located in the west part of town. Sentence11: Yes it does. Can you verify the total travel time and price? Sentence12: Thank you goodbye. Sentence13: Thanks a lot, that's all. Sentence14: Sure - the travel time is 47 minutes, and the fee is 9.80GBP per ticket. Sentence15: I also need a nightclub in the west. Sentence16: Could you get me the postcode and entrance fee for there? Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I have 2 guest house.One is in the moderate price range and the other is cheap. Would you like to book one of these? Sentence2: There are no expensive hotels with 4 stars in the south with free parking? I'll take cheap if there aren't, but I need the address and phone number, please. Sentence3: I am looking for a hotel with a 4 star rating and price no more then 125 a night. Sentence4: Can you give me the phone number for Primavera? Sentence5: Primavera is in the centre at 10 King s parade. Admission is free. Can I get you a train or taxi as well? Sentence6: That sounds fine. Can you provide the phone number and address? And, is that considered a hotel or a guesthouse? Sentence7: Certainly! Phone number is 01223357708. Would you be interested in any restaurants or hotels while there? Sentence8: I am looking for a place to go in the centre of town. Sentence9: I have about 44 attractions to choose from in the centre. Can you tell me what type of attraction you are looking for? Sentence10: Yes, I would like to find a place to stay in the south with free parking. Could you help me? Sentence11: It is a guesthouse and the address is 53 roseford road. The phone number is cb22ha. Sentence12: Can you just choose one for me and give me the phone number? Sentence13: Please tell me your price range and hotel star rating preference. Sentence14: I'm sorry, can you provide that phone number again? I got a post code. Sentence15: I have rosa's bed and breakfast. It is in the south and cheap with 4 stars. Sentence16: I have 11 museums in the centre of town. They are all free. Do you have a type of museum in mind? Sentence17: The phone number for rosa's bed and breakfast is 01223512596 Sentence18: Maybe a museum would be nice. I am not sure. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: The first train leaves at 5:24. Sentence2: I think that should be it for today. Thank you so much for all of your help, you've been very kind! Sentence3: I would like to go to a museum the area doesn't matter. Sentence4: I'll be going to cambridge from stansted airport. I'd like to arrive by 09:30. Sentence5: Ok, that will work out. Can I have the train ID # please? Thanks so much Sentence6: Sounds good. I am also looking for a train for tuesday. Sentence7: Which is your favorite, and what area is it in? Sentence8: Are you looking for a place to stay, to eat, or a attraction to visit? Sentence9: I'd be happy to help you with that. Can you tell me where you're leaving from and your preferred travel times? Sentence10: I am looking for information in Cambridge. Sentence11: The train ID is TR9892. Sentence12: Your welcome, enjoy your stay in cambridge. Sentence13: We have many museums in Cambridge. Would you prefer one with a free entrance fee? Sentence14: I like byard art. It's located in the south. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output:
Answer: (B) System