Problem: Generate a sentence that contains a fact.
Sentence: phase changes do not change mass

Problem: Generate a sentence that contains a fact.
Sentence: landfills have a negative impact on the environment

Problem: Generate a sentence that contains a fact.
Sentence: an ecosystem contains a large community of living organisms in a particular place

Problem: Generate a sentence that contains a fact.
Sentence:
evaporation is when water is drawn back up into the air in the water cycle