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: Urine leaves the body through a sphincter in the process of urination. 
Fact 2: Fluids in the urine eliminate metabolic waste products.
Example Output: Metabolic waste products can leave the body through a sphincter.

Example Input: Fact 1: hydropower requires damming a river. 
Fact 2: Hydropower is a renewable resource.
Example Output: Damming a river can provide a renewable resource.

Example Input: Fact 1: nectar is used for attracting pollinators by plants. 
Fact 2: Pollinators: Bees, and particularly honey bees, are the primary pollinators.
Example Output:
nectar is used to attract bees to plants.