Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: It may be impossible to tell if the body of water in the image is a river.
 The question and answer:
Test for natural language inference.
Premise: "A large group of people rafting."
Hypothesis: "A large group of people are rafting on a river."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
The answer is it is not possible to tell