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: pollutants have a negative impact on the environment. 
Fact 2: Incineration is harmful to the environment, it pollutes.
Example Output: inceneration is harmful to the environment.

Example Input: Fact 1: the mass of an object causes the gravitational force exerted by that object. 
Fact 2: Gravity accelerates mass.
Example Output: gravitational force accelerates objects.

Example Input: Fact 1: Mammalian teeth are important for digestion. 
Fact 2: When the nutrient is digested and absorbed by the body, it provides the body with health benefits.
Example Output:
For mammals, teeth are important for providing health benefits via absorbed nutrients.