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: Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants. 
Fact 2: Alcohol includes ethanol and methanol.
Example Output: alcohol can make methanol.

Example Input: Fact 1: Viruses contain DNA but not much else. 
Fact 2: Viruses are germs that cause people to get sick.
Example Output: germs that cause people to get sick contain DNA but not much else.

Example Input: Fact 1: rocks interacting with wind over long periods of time causes weathering. 
Fact 2: Limestone is the rock formed by calcite.
Example Output:
Limestone interacting with wind over long periods of time causes weathering.