Given the following reasoning and answer, what was the question? Sentence 1: A pilot leans out the open window the cockpit to clean the window of his plane. Sentence 2: A man cleans a plane window.
 The answer: it is not possible to tell
The question Test for natural language inference.
Premise: "A pilot leans out the open window the cockpit to clean the window of his plane."
Hypothesis: "A man cleans a plane window."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell