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: weathering means breaking down rocks from larger whole into smaller pieces by weather. 
Fact 2: Massive boulders and tiny rocks influence the sound and path of water.

Output: weathering means breaking down boulders by weather.


Input: Consider Input: Fact 1: Most bryophytes are small. 
Fact 2: Bryophytes are very old land plants.

Output: Most very old land plants are small.


Input: Consider Input: Fact 1: Cancer is a disease in which cells divide out of control. 
Fact 2: Leukemias are cancers of the blood.


Output: leukemia is a disease in which cells divide out of control.