Problem: Generate a sentence that contains a fact.
Sentence: when a mineral is rubbed on a streak plate , some of the material breaks off and forms a powder

Problem: Generate a sentence that contains a fact.
Sentence: magnetism does not require contact between objects to act

Problem: Generate a sentence that contains a fact.
Sentence: a magnet attracts ferromagnetic metals through magnetism

Problem: Generate a sentence that contains a fact.
Sentence:
melting is when solids are heated above their melting point