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.

Ex Input:
Fact 1: hitting an object causes the particles in that object to vibrate. 
Fact 2: Sounds are caused by vibrations.

Ex Output:
hitting an object causes Sounds.


Ex Input:
Fact 1: a solar panel converts sunlight into electricity. 
Fact 2: Sunlight is composed of photons, or particles of solar energy.

Ex Output:
A solar panel converts photons into electricity.


Ex Input:
Fact 1: Energy enters ecosystems in the form of sunlight or chemical compounds. 
Fact 2: Energy is a basic necessity of an ecosystem.

Ex Output:

The basic necessity of an ecosystem enters in the form of sunlight.