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: Steroid hormones are made of lipids, such as phospholipids and cholesterol. 
Fact 2: Lipids Lipids are diverse hydrophobic molecules.
Example Output: Steroid hormones are made of diverse hydrophobic molecules, such as phospholipids and cholesterol.

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: sunlight and rain can cause a rainbow. 
Fact 2: And light broken into many pieces is a rainbow.
Example Output:
Sunlight and rain can cause light to be broken into many pieces.