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: lungs are used for breathing air by land animals. 
Fact 2: African Elephants are the biggest land animals.
[EX A]: african elephants have lungs.

[EX Q]: Fact 1: Viruses contain DNA but not much else. 
Fact 2: DNA is encoded information.
[EX A]: viruses contain encoded information but not much else.

[EX Q]: Fact 1: boiling means change from a liquid into a gas by adding heat energy. 
Fact 2: Gas is the source of energy for heating water and for the stove.
[EX A]:
gas heats water and turns it into gas.