Given the following reasoning and answer, what was the question? Five men are leaving their country by river for a vacation.
 The answer: it is not possible to tell
The question Test for natural language inference.
Premise: "Five men ride a boat on a very wide river."
Hypothesis: "With the jungle as a background."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell