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: pushing on the pedals of a bike cause that bike to move. 
Fact 2: First, overcoming inertia to move forward is difficult.
Example Output: Pushing on bike pedals cause the bike to overcome inertia.

Example Input: Fact 1: a flashlight requires a source of electricity to produce light. 
Fact 2: Light contains energy.
Example Output: A flashlight requires a source of electricity to produce visible energy.

Example Input: Fact 1: Cells are the microscopic building blocks of organisms. 
Fact 2: Plants and animals are organisms.
Example Output:
Cells are the microscopic bulding blocks of plants and animals.