You will be given a definition of a task first, then some input of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: What area is that in? Sentence2: 08715501010 Can I help you with anything else? Sentence3: You can reach them on 01223400170 Sentence4: Not right now, but could you give me their phone number and postcode? Sentence5: What is their phone number? Sentence6: it is in the south area. Sentence7: Can you also help me book a taxi Sentence8: I'd love to. The address is 2G Cambridge Leisure Park Cherry Hinton Road Cherry Hinton, and the postcode is cb17dy. Sentence9: that's all i need thanks Sentence10: I am excited to be coming and would love to find an expensive mexican restaurant. Sentence11: What about something for entertainment? Sentence12: How many passengers will there be? Sentence13: Then you want chiquito restaurant bar on the southend! Would you like me to book you a table? Sentence14: Are there any architectural attractions near there? Sentence15: Could I get a phone number for the restaurant please? Sentence16: There are no architecture attractions in the south. Sentence17: Certainly, were would you like the taxi from? Sentence18: It will just be me, so one. Sentence19: I want to leave the Tenpin by 17:15 to go to the Chiquito restaurant. Sentence20: You are booked for a grey Toyota. The taxi contact number is 07123501809. Do you need help with anything else? Sentence21: Sure, most people love Tenpin, located at Cambridge Leisure Park, Clifton Way, postcode cb17d. Sentence22: Glad I could help, have a good day. Question: Who has spoken the sentence 11? (A) User (B) System
Output:
Answer: (B) System