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.

Input: Consider Input: Fact 1: Condoms can break; Condoms can be used incorrectly. 
Fact 2: If the condom breaks, withdraw the penis and condom immediately.

Output: a broken condom should be discarded immediately.


Input: Consider Input: Fact 1: a valley is formed by a river flowing. 
Fact 2: Examples are Napa Valley and Sonoma Valley.

Output: Napa and Sonoma were formed by a river flowing.


Input: Consider Input: Fact 1: harming an animal species has a negative impact on the population size of that species. 
Fact 2: Population size has no bearing on that amount of genetic variation found within a population.


Output: harming an animal species has no bearing on the amount of genetic variation found within a population.