Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I need a taxi to take me to the restaurant from the museum. Sentence2: The Cambridge and Country folk museum is located in the west. It has an entrance fee of 3.50 pounds. Can I tell you anything else about it? Sentence3: No that will be all thanks so much. Sentence4: I'm so sorry! Checked my sources and don't see a Singaporean restaurant in any part of town. May I help you in some other way? Sentence5: Yes Can you find me a hotel that is cheap? Sentence6: no thanks that is all Sentence7: enjoy your stay with us! Sentence8: Excellent. You are all set with a red Skoda. The contact number is 07563648759. Anything else I can help with? Sentence9: I need to get to the restaurant in time for the reservation. Sentence10: In what area would you like the hotel to be? Sentence11: There are none available, do you have another type of food. Sentence12: A table is booked for Saturday for 15:45 at 8 and for 8 people. Reference number is B00KVHN Sentence13: There are several. May I suggest Curry Garden is located in the Centre and has an expensive price range. Would you like a reservation? Sentence14: What time of day would you like this booking for? Sentence15: Sorry that last sentence must have been a bad connection, disregard that. Still looking for a restaurant, are there any expensive indian ones in the centre? Sentence16: Yes, can you book a table for 8 people on Saturday at 15:45? Sentence17: Hello, can you help me find a pricey Singaporean restaurant in Cambridge? Sentence18: I sort of really had my heart set on Singaporean food. Sentence19: Is there anything else I can help you with today? Sentence20: I'm also looking for a place called cambridge and country folk museum. Question: Who has spoken the sentence 19? (A) User (B) System
Output:
Answer: (B) System