Given the following reasoning and answer, what was the question? A gathering at a train yard festival are not necessarily enjoying a festival of trains.
 The answer: it is not possible to tell
The question Premise: "A gathering of people having a festival at a train yard."
Based on this premise, can we conclude that the hypothesis "People are enjoying a festival of trains." is true?
Options:
- yes
- it is not possible to tell
- no