Q: Premise: "An elderly woman looks upset."
Hypothesis: "And an elderly man is in the background."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: it is not possible to tell
Chain-of-thought: An elderly man has done something to upset his elderly wife.

Q: Premise: "Two basketball teams are scrambling for the ball in play."
Hypothesis: "A basketball player dunks a ball."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: no
Chain-of-thought: Teams suggests that there are multiple people not one single player.

Q: Premise: "A woman in a black and white dress conducting a choir."
Hypothesis: "A priest hears confession."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: no
Chain-of-thought: The subject either hears a confession or is conducting a choir.

Q: Premise: "A man in black wearing a helmet on a mountain bike travelling very fast."
Hypothesis: "A man on a mountain bike."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A: yes
Chain-of-thought:

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
The common fact is that a man is on a mountain bike.