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: telephones are used for communication by two people by transmitting sound. 
Fact 2: All sounds are waves produced by the vibrations of material objects.
Example Output: Telephones are used for communication by two people by transmitting waves produced by the vibrations of material objects.

Example Input: Fact 1: Lancelet larvae are free-swimming. 
Fact 2: Some types of snails are free swimming, while others are sessile.
Example Output: lancelet larvae are not sessile.

Example Input: Fact 1: absorbing sunlight causes objects to heat. 
Fact 2: Sunlight, for instant, takes a full 8 minutes to cross the 150 million km to our windows.
Example Output:
Absorbing something that takes 8 minutes to cross to Earth causes objects to heat.