Question. Given the sentence "Two motorcycles and their riders." is it true that "Two members of hell's angels."?
Answer. it is not possible to tell
What step-by-step reasoning justifies that answer?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Reasoning: Just because two motorcycles and their riders does not indicate that two members of Hell's Angels.