Answer the following question, with explanation first.
Given the sentence "A brown labradoodle retrieves a tennis ball in a lake." is it true that "Child throws tennis ball into lake for brown dog to fetch."?

it is not possible to tell
A dog retrieving a ball from a lake can be done for a variety of purposes beyond fetch and the ball could have gotten there from many more ways than simply a 'child throws.

.

Final answer: it is not possible to tell