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: Macroevolution is evolution over geologic time above the level of the species. 
Fact 2: Besides the above-named species, various other species of the genus have been used medicinally.
Example Output: Macroevolution is evolution over geologic time at the genus level and above.

Example Input: Fact 1: Hair helps to insulate and protect the body. 
Fact 2: All mammals have hair.
Example Output: most mammals have insulation that also protects the body.

Example Input: Fact 1: an egg requires warmth to survive. 
Fact 2: Eggs indicate eggs in the ovaries.
Example Output:
it is warm inside of ovaries.