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: Carbon may be stored in sedimentary rock for millions of years. 
Fact 2: Limestone is a rock composed of calcium, carbon and oxygen.
Example Output: limestone contains carbon.

Example Input: Fact 1: Cancer is a disease in which cells divide out of control. 
Fact 2: With specific types of gene damage, the cell starts dividing out of control, forming a tumor.
Example Output: Cancer and tumors are a result of specific types of gene damage.

Example Input: Fact 1: evaporation can be used for separating a solute from a solvent in a solution. 
Fact 2: Gasoline, paints and solvents evaporate, releasing reactive organic compounds.
Example Output:
Gasoline releases organic compounds when it separates.