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.

Input: Consider Input: Fact 1: Fractures heal when osteoclasts form new bone. 
Fact 2: Osteoclasts are multinucleated cells.

Output: fractures heal when multinucleated cells form new bone.


Input: Consider 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.

Output: Mammalian teeth are important for gleaning nutrients from food.


Input: Consider Input: Fact 1: habitat destruction causes animals to move to find shelter in another habitat. 
Fact 2: Wildfires can also threaten people's homes and destroy wildlife habitat.


Output: Wildfires cause animals to move in order to find shelter.