Premise: "The six people are in a blue raft in the water and one person flew out of the raft."
Hypothesis: "Some people are rafting down dangerous rapids."
Do we know that the hypothesis entailed by the premise? Now, let's be accurate as possible. Some thinking first:
Not everyone on a waterborne raft that flies out of the raft are on dangerous rapids. So, the answer is it is not possible to tell.