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: Some parasites kill their host, but most do not. 
Fact 2: Tapeworms are internal parasites of vertebrates.
Example Output: most tapeworms do not kill their host.

Example Input: Fact 1: a flashlight converts chemical energy into light energy. 
Fact 2: Students should describe how the electrical energy from the batteries changed to light energy in the flashlight bulb and then to heat energy that could be felt.
Example Output: A flashlight utilizes batteries to store chemical energy.

Example Input: Fact 1: pollutants have a negative impact on the environment. 
Fact 2: Second, the environment is important to health.
Example Output:
Pollutants have a negative impact on human health.