Problem: Generate a sentence that contains a fact.
Sentence: hydropower requires damming a river
Problem: Randomly generate a fact.

Random fact: if seeds stick to the fur of an animal then that seed will be transported by the animal
Generate a sentence that answers this question: "What substance found in rocks shares it's name with an object which can take wrinkles from an item worn on the body to cover the skin from the elements?".

Answer: rocks sometimes contain iron
question: What sentence would provide a factual answer to this question: "a car engine usually converts gasoline into motion and heat through what?"

answer: a car engine usually converts gasoline into motion and heat through combustion
Problem: What is a random fact?

Answer: a solar panel converts sunlight into electricity
Problem: Generate a sentence that contains a fact.
Sentence:
a ruler is used for measuring the length of an object