Consider the question. Premise: "A little boy and a little girl are playing with pebbles on the beach."
Hypothesis: "The children are playing with pebbles in the sand at the beach."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
 If the answer is 'it is not possible to tell'; explain the reasoning:
Where there are pebbles and beaches there is not necessarily sand.