Given the sentence "A large orange dog runs through the grass by the water where a large boat is sailing in the background." is it true that "A dog is running by a lake with a sailboat in the background."?
Let's solve step-by-step:
Not all bodies of water are lakes. Not all large boats are sailboats; just because it is a large boat does not mean it is a sailboat. The answer is it is not possible to tell.