Problem: Generate a sentence that contains a fact.
Sentence: water flows down a slope

Problem: Generate a sentence that contains a fact.
Sentence: echolocation is when some animals detect objects by hearing echoes by emitting sound

Problem: Generate a sentence that contains a fact.
Sentence: fog is formed by water vapor condensing in the air

Problem: Generate a sentence that contains a fact.
Sentence:
the tide cycle regularly occurs twice per day