Problem: Generate a sentence that contains a fact.
Sentence: microscope is used to see small things by making them appear bigger

Problem: Generate a sentence that contains a fact.
Sentence: as the mass of an object increases , the force required to push that object will increase

Problem: Generate a sentence that contains a fact.
Sentence: natural gas is a source of heat by burning

Problem: Generate a sentence that contains a fact.
Sentence:
when a sound is produced inside of a room , there is sometimes an echo after the sound