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: HIV infects and destroys helper T cells. 
Fact 2: Helper T cells are the critical link in our immune system.
Example Output: HIV damages our immune system.

Example Input: Fact 1: electrocution causes harm to an organism. 
Fact 2: Plants are sensitive organisms.
Example Output: electrocution causes harm to plants.

Example Input: Fact 1: Coral reefs provide food and shelter to many ocean organisms. 
Fact 2: Each huge coral reef begins with a single polyp.
Example Output:
Food and shelter for many ocean organisms begins with a single polyp.