instruction:
You are given a sentence from a conversation between a human and a virtual assistant. Your task is to identify whether the sentence is a question or not. Answer with Yes or No.
question:
Can I call them? Is there live music?
answer:
Yes


question:
No. I need to observe it with subtitles. I need to observe The Aftermath.
answer:
No


question:
Please, make it at quarter past 5 in the evening.
answer:
No