Problem: Generate a sentence that contains a fact.
Sentence: a complete revolution of the Earth around the sun takes one solar year

Problem: Generate a sentence that contains a fact.
Sentence: friction acts to counter the motion of two objects when their surfaces are touching

Problem: Generate a sentence that contains a fact.
Sentence: if two objects have the same charge then those two materials will repel each other

Problem: Generate a sentence that contains a fact.
Sentence:
an electromagnet contains cylindrical ferrous metal