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: Mollusks are invertebrates such as the common snail. 
Fact 2: Invertebrates have no backbone.
Example Output: mollusks have no backbone.

Example Input: Fact 1: rest has a positive impact on a health. 
Fact 2: Health is essential to a quality life.
Example Output: rest is essential to quality of life.

Example Input: Fact 1: erosion causes a river to become deeper and wider. 
Fact 2: Erosion is loss of soil caused by rain and wind.
Example Output:
Wind and rain cause a river to become deeper and wider.