Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: That is great. Thank you, goodbye. Sentence2: Enjoy your time at the museum and the center. If there is anything else you need help with please contact us anytime. Sentence3: There are many trains. Any date/time/places you were looking to travel to? Sentence4: I want to arrive in Stevenage and leave Cambridge on a Friday. Sentence5: Sure thing. Both are free and the postcode for the museum of archaeology is cb23dz and the fitzwilliam postcode is cb21rb. Sentence6: TR5497 leaves at 07:21 and arrives at 08:10. Would you like to purchase a ticket? Sentence7: I would like to arrive by 10:00. Can you please give me the train ID and departure time? Sentence8: ok and what are their entrance fees? Sentence9: Can I have the entrance fees for both of those please, and the associated postcodes? Sentence10: There are ten trains on Friday. The first train leaves at 05:21 and the last train leaves at 23:21. What time do you want to leave or arrive? Sentence11: There's 23 museums in the Cambridge area. Is there a specific part of town you'd like to visit? Sentence12: Hi! I need to get a train schedule, can you help me with this? Sentence13: There are 11 museums in that area, including museum of archaelogy and anthropology and the fitzwilliam museum. Sentence14: No thank you. I do need to find a museum to visit though. Sentence15: Bot museums are free, they do not have an entrance fee. Sentence16: I would like it to be in Centre. Question: Who has spoken the sentence 5? (A) User (B) System
Output:
Answer: (B) System