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: Reproduction is the process by which organisms give rise to offspring. 
Fact 2: Sex equals reproduction.
Example Output: sex is the process by which organisms give rise to offspring.

Example Input: Fact 1: the surface of a beach is formed by mechanical weathering. 
Fact 2: Beaches and Sand Dunes Dunes are accumulations of sand blown from the beach by the wind.
Example Output: sand formations are formed by wind.

Example Input: Fact 1: Sweat wets the skin, and when it evaporates, it cools the body. 
Fact 2: Sweat is water, salt, some urea.
Example Output:
Something containing urea cools the body.