Given the task definition and input, reply with output. You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: No, that's ok. I just wanted to know the arrival time. Thanks. Sentence2: No, that sounds great! I also need to travel by train from Cambridge to Peterborough. Sentence3: thank you and enjoy your stay! Sentence4: To clarify, you need to leave cambridge by train to peterborough? I can help you with that. What day and time? Sentence5: I'm looking for a museum to visit. Sentence6: I have 23 to choose from. Do you have a preference on location to help narrow the search? Sentence7: Well, museum of archaelogy and anthropology is located at university of cambridge, downing street, cb23dz, centre. Would you like another musuem? Sentence8: I need to leave on Friday sometime after 18:00. Sentence9: I have a few options, the earliest leaves at Cambridge at 18:06 and arrives in Peterborough at 18:56. Tickets are available, would you like to book? Sentence10: 23? I had no idea! I was looking for postcodes, areas and addresses. Question: Who has spoken the sentence 7? (A) User (B) System
Answer: (B) System