Reconstruct a question, answer pair from this explanation: Not all professional glass makers are artists. The fact that professional glass maker firing a piece in a gigantic oven doesn't imply that he is making a custom piece for a customer.
Q:Given the sentence "A professional glass maker firing a piece in a gigantic oven." can we conclude that "Artist making a custom piece for a customer."?
Options:
- yes
- it is not possible to tell
- no
A:it is not possible to tell