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: an animal usually requires a warm body temperature for survival. 
Fact 2: Many warm-blooded animals control their body temperature by sweating or panting.
Example Output: warm-blooded creatures control their body temperature by sweating or panting for survival.

Example Input: Fact 1: Light enters the eye through an opening called the pupil. 
Fact 2: Light is essential to vision.
Example Output: vision requires the pupil.

Example Input: Fact 1: Plants live just about everywhere on Earth. 
Fact 2: All plants live and grow by photosynthesis.
Example Output:
Photosynthesis can be found just about everywhere on Earth.