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: hearing is used for sensing sound by animals. 
Fact 2: An ear improves hearing.

Output: Most animals have ears.


Input: Consider Input: Fact 1: when a body of water receives more water than it can hold , a flood occurs. 
Fact 2: Floods are deadly, floods are devastating.

Output: When a body of water receives more water than it can hold, death and devastation can result.


Input: Consider Input: Fact 1: claws are used to catch prey by some predators. 
Fact 2: Birds of prey swoop swiftly down on mice, and never challenge the horns of the deer.


Output: claws are used to catch mice by some predators.