Problem: Generate a sentence that contains a fact.
Sentence: crop rotation is when different crops are planted on a field in different years

Problem: Generate a sentence that contains a fact.
Sentence: a tree is a source of food for animals in an ecosystem

Problem: Generate a sentence that contains a fact.
Sentence: the sun transfers solar energy from itself to the Earth through sunlight

Problem: Generate a sentence that contains a fact.
Sentence:
an organism is a source of organic material