I'll give you a question, please answer with step-by-step reasoning process.
Can we conclude from "A man grinds with his skateboard on a rail with a man in the background watching." that "A skateboarder jumps over a rail."?\nOptions:\n- yes\n- no\n- it is not possible to tell

no
The same skateboarder cannot grind a rail if he jumps over it.

.

The final answer: no