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.

Example Input: Fact 1: thick fur can be used for keeping warm. 
Fact 2: Carpet beetle larvae feed on the keratin and chitin commonly found in wool, fur, or feathers.
Example Output: keratin can be used for keeping warm.

Example Input: Fact 1: the emission of sulfur dioxide causes acid rain. 
Fact 2: ACID RAIN Acid rain is polluted and harmful to the environment.
Example Output: Sulfur dioxide emissions cause pollution and harm to the environment.

Example Input: Fact 1: if an animal lives under ground then that animal will be protected from a wild fire. 
Fact 2: Most shrews live on or under the ground, searching through the vegetation for food.
Example Output:
shrews will be protected from a wild fire.