Given the following reasoning and answer, what was the question? Not all dogs enjoy playing fetch. Tennis balls aren't only used for a dog who enjoys fetch.
 The answer: it is not possible to tell
The question Test for natural language inference.
Premise: "A man about to throw a tennis ball to a brown dog in the grass."
Hypothesis: "A man is going to throw a ball for the dog because the dog enjoys playing fetch."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell