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: Light enters the eye through an opening called the pupil. 
Fact 2: Just behind the pupil is a lens.
Example Output: light enters the eye through an opening just in front of the lens.

Example Input: Fact 1: freezing means changing from a liquid into a solid by reducing heat energy. 
Fact 2: Ice is a cold frozen liquid.
Example Output: Ice is made from reducing heat energy.

Example Input: Fact 1: Algae play significant roles as producers in aquatic ecosystems. 
Fact 2: Algae Algae Green algae are the simplest of green plants.
Example Output:
simple green plants play significant roles as producers in aquatic ecosystems.