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: Animals adapt to cold temperatures. 
Fact 2: Adaptation living things adapt to their environment.
Example Output: Animals are living things.

Example Input: Fact 1: Feathers help birds fly and provide insulation. 
Fact 2: Penguins rely on their feathers for insulation.
Example Output: penguins are kept warm with feathers.

Example Input: Fact 1: when water freezes , that water expands. 
Fact 2: Water freezes at 32 degrees.
Example Output:
When water's temperature drops to 32 degrees, it expands.