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

Ex Input:
Sentence1: Would you like British food? Sentence2: Where are you going or coming from? Sentence3: I will be leaving Cambridge and heading to Ely. Sentence4: The TR8399 leaves from Cambridge on Monday at 09:50. Shall I book that for you? Sentence5: Oh that's great. That would be all, thank you. Sentence6: Sure, that works for me. I need the phone number, postcode, and address for the restaurant. Sentence7: Is there a certain time you need to arrive by? Sentence8: I am looking for a restaurant. The restaurant should be in the centre and should be in the moderate price range. Sentence9: You have 2 seats reserved, and you'll pay 8.8 GBP at the station. Your reference number is 90RLYZKX . Can I help you with anything else? Sentence10: I don't have a food preference. Sentence11: yes, for 2 people. Please give me the reference number. Sentence12: I just need to leave after 08:45 Sentence13: Cotto is a great british restaurant located on 183 East Road City Centre. Their postcode is cb11bg and phone number is 01223302010. Is there anything else you need? Sentence14: Please find me a train that leaves on Monday after 08:45 Sentence15: There are 21 restaurants in the centre. Do you have a certain type of food you'd prefer? Sentence16: Thank you for using our service today. Question: Who has spoken the sentence 13? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: maybe, give me the address of one please Sentence2: There are several college's in the centre. How about Saint Catharine's College? It is on King's Parade and has free admission. Sentence3: I have train TR3343 arriving at london kings cross tuesday at 7:00. Shall I book that for you? Sentence4: Hi, I'm trying to find a place to go in the centre. A college would be fun to visit! Sentence5: Where will you be departing from, and what day would you like to travel? Sentence6: Yes, I need 4 tickets please. Please send me the reference number. Sentence7: Great! I would be happy to help you find one. Are you looking for one with free admission? Sentence8: Have a nice day and thank you for contacting us. Sentence9: Your tickets have been reserved, and just to clarify, that train departs at 07:00, and arrives in London, Kings Cross at 07:51. Wouldn't want you to miss the train! Ref#: AQDCG6N8 Sentence10: I'll be departing from Cambridge, and would like to leave on Tuesday. Sentence11: Thank you. I also need a train to London Kings cross, arriving by 9 Sentence12: OK thank you that is all I needed today. Question: Who has spoken the sentence 2? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: TR5886 leaves at 09:17, price is 23.60 pounds a person, do you want me to book you? Sentence2: We have many trains available that are leaving london kings cross after 8:15. What is the location of your destination? Which day would you like to leave on? Sentence3: I will be leaving after 8:15 from london kings cross. Sentence4: Which one would you recommend for me to visit as a tourist? I need the postcode, entrance fee and phone number for it. Sentence5: Is there a certain area you're looking at? Sentence6: I have made that reservation and your reference number is IADFZDHY . Sentence7: sweet, brah. i'm also looking to book a train. Sentence8: Thank you for contacting us and have a nice day. Sentence9: I highly recommend downing college. It's free! The postcode is cb21dq and the phone number is 01223334860. Sentence10: Yes, I'm looking for something close to the center of town. Sentence11: Thank you. Yes I would really love for you to book the train for 2 people. Sentence12: Is there a college in the centre area that you could give me more information on? Sentence13: Great, thanks so much! That's all I'll be needing! Bye bye! Sentence14: There are several, what would you like to know? Sentence15: Okay brah where you leaving from? Sentence16: I'm not finding anything close to the centre of town. Is there another area you'd like me to check for you? Sentence17: Any suggestions for entertainment? Sentence18: I will travel in Tuesday. Arrival is not important. Question: Who has spoken the sentence 17? (A) User (B) System

Ex Output:

Answer: (B) System