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: Mammalian teeth are important for digestion. 
Fact 2: For instance, bacteria in the digestive tract helps glean the most nutrients from food.
Example Output: Mammalian teeth are important for gleaning nutrients from food.

Example Input: Fact 1: a drought can change the color of an environment from green to brown. 
Fact 2: Cabbage is damn hard to dehydrate without turning brown.
Example Output: A drought can dehydrate an entire environment.

Example Input: Fact 1: Cells are the basic units of the structure and function of living things. 
Fact 2: Cells are the basic unit of life .
Example Output:
life requires cells.