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: Blood pressure is highest in arteries and lowest in veins. 
Fact 2: Apocymarin raises blood pressure.
Example Output: apocymarin affects veins and arteries.

Example Input: Fact 1: Some species of reptiles can go several weeks between meals. 
Fact 2: Reptiles lay eggs protected by leathery shells.
Example Output: Some layers of leathery eggs can go several weeks between meals.

Example Input: Fact 1: threatening behavior by predators causes a porcupine to extend its quills. 
Fact 2: Fishers are predators that can eat porcupines.
Example Output:
A threatening behavior by a fisher can make a porcupine extend its quills.