What was the question for this implicit rationale, and corresponding answer?
A man in yellow grimaces is not necessarily frowning at a poor joke.
 The answer: it is not possible to tell
The question: Test for natural language inference.
Premise: "A man in yellow grimaces."
Hypothesis: "A man is frowning at a poor joke."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell