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

[EX Q]: Sentence1: Are you sure? I'd really like some Austrian food. Sentence2: Yes I am sure. However, I do have a number of restaurants listed as serving European food. Would you like information on these? Sentence3: Thank you, let us know if you need any more help with anything. Sentence4: The phone number is 01223307030. The address is Quayside Off Bridge STreet and the postcode is cb58aq. Can I book a reservation? Sentence5: Yes please. I prefer the centre of town if possible. Sentence6: I would like for that to be cheap as well. Sentence7: No, I'm all set, thanks. Goodbye! Sentence8: Hi, I'm looking for a cheap austrian restaurant. Sentence9: Sounds good. Could you give me the number? Also, the address and postcode. Sentence10: The River Bar Steakhouse and Grill located in the Centre has cheap Modern European food. Would you care for that? Sentence11: There are a number of European options in the town centre. Do you have a price range? Sentence12: I'm sorry but I don't have any Austrian restaurants? Would you like to try a different cuisine? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: How about an expensive restaurant that serves British food? Sentence2: Cineworld sounds perfect. What's their postal code? Sentence3: The postal code is cb17dy. Can I get you anything else? Sentence4: There are six expensive British restaurants in Cambridge. Do you have a preferred section of town? Sentence5: Have a good time! Sentence6: It's all new to me. Could you recommend one? Sentence7: Sure thing, we have the cineworld cinema located at Cambridge leisure park, Clifton way. Sentence8: Absolutely, I recommend the Cambridge Chop House at 1 Kings Parade in the centre of town. This is a highly recommended British experience by locals and tourists a-like. Sentence9: No, that'll be all. Thank you for all of your help today. Sentence10: I am sorry but there are no restaurants matching your requests. Would you like me to search for a different food type? Sentence11: Great. Could you also help me find a cinema in the south of town? Sentence12: Hello, I am trying to locate a restaurant that serves northern European food, and I would prefer a more elegant setting. Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I'm trying to find a local hospital. Sentence2: You are more than welcome! Sentence3: The phone number is 01223245151. Is there anything else I can help you with? Sentence4: Not right now, thank you. Sentence5: The Addenbrookes Hospital is located at Hills Rd, Cambridge Postcode CB20QQ. Sentence6: thank you, is there is a phone number? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System