I'll give you a question, please answer with step-by-step reasoning process.
If "A motorcycle rider starts to sand up on the seat of his white motorcycle." does that mean that "The white motorcycle is stopped."?\nOptions:\n- yes\n- it is not possible to tell\n- no

it is not possible to tell
A rider can start to stand up on a motorcycle even if it isn't stopped and is in motion.

.

The answer is it is not possible to tell