Problem: Generate a sentence that contains a fact.
Sentence: melting point means temperature at which a solid melts

Problem: Generate a sentence that contains a fact.
Sentence: the excretory system removes waste from the body

Problem: Generate a sentence that contains a fact.
Sentence: a producer is a source of sugar in an ecosystem

Problem: Generate a sentence that contains a fact.
Sentence:
coal is used to produce electricity by burning in coal-fire power stations