Generate a sentence that answers this question: "An example of a mixture is".

Answer: An example of a mixture is clay mixed together
question: What sentence would provide a factual answer to this question: "An item that might have more tightly packed matter is"

answer: matter with variable volume and shape assumes the shape and size of its entire container
Problem: What is a random fact?

Answer: no light shines through an opaque object
Problem: Generate a sentence that contains a fact.

some lizards live in desert habitats
Problem: Generate a sentence that contains a fact.
Sentence: when a sound is produced inside of a room , there is sometimes an echo after the sound
Problem: What is a random fact?

Answer:
an ecosystem contains large numbers of living organisms in a particular place