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: Most pituitary hormones control other endocrine glands. 
Fact 2: An abnormal endocrine gland is often blamed for producing obesity.
Example Output: Pituitary hormones can be blamed for producing obesity.

Example Input: Fact 1: Insects may live in large colonies and have complex social behaviors. 
Fact 2: Ants are social insects.
Example Output: ants may live in large colonies and have complex social behaviors.

Example Input: Fact 1: sediment is formed by weathering. 
Fact 2: Rocks breakdown by weathering.
Example Output:
Sediment is formed by breaking down rocks.