Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.

[EX Q]: Fact 1: a camera is used for recording images. 
Fact 2: Movies are images and moving pictures.
[EX A]: A camera is used for recording still and moving pictures.

[EX Q]: Fact 1: irradiating food can be used to kill existing microorganisms in the food. 
Fact 2: Irradiation causes chemical changes.
[EX A]: chemical changes can be used to kill existing microorganisms in the food.

[EX Q]: Fact 1: microscope is used to see small things by biologists by making them appear bigger. 
Fact 2: Biologists use microscopes to study things that are too small to be seen with the unaided eye.
[EX A]:
Biologists study small things that can't normally be seen with an unaided eye.