Problem: Generate a sentence that contains a fact.
Sentence: if an object undergoes chemical change then that object will have new chemical properties
Problem: Randomly generate a fact.

Random fact: a mammal usually nurses its offspring
Generate a sentence that answers this question: "Cameras reflect".

Answer: tinted lenses reflect ultraviolet rays
question: What sentence would provide a factual answer to this question: "The cracks in a sidewalk could be caused by"

answer: if a tree is located near a sidewalk then the roots of that tree might crack the sidewalk
Problem: What is a random fact?

Answer: a revolution of the moon around the Earth takes 1 month
Problem: Generate a sentence that contains a fact.
Sentence:
if an animal hatches from an egg then that animal is born