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: Sight is the ability to sense light, and the eye is the organ that senses light. 
Fact 2: Vision begins with sight.
Example Output: Vision is the ability to sense light and the eye is the organ that senses light.

Example Input: Fact 1: plant reproduction often requires pollen. 
Fact 2: Honeybees and other bees transfer the pollen.
Example Output: Plant reproduction often requires honeybees.

Example Input: Fact 1: Aging is associated with the death of cells. 
Fact 2: Telomeres degrade as the cells divide and their shortening causes cell death.
Example Output:
Aging is associated with degrading telomeres.