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: most canyons are formed by flowing rivers through erosion over long periods of time. 
Fact 2: Canyon Lake Canyon lake was formed by dams on the Salt River.
Example Output: dams can form canyons.

Example Input: Fact 1: most canyons are formed by flowing rivers through erosion over long periods of time. 
Fact 2: Erosion was monitored by means of erosion pins.
Example Output: Canyon changes are tracked with pins.

Example Input: Fact 1: Caecilians can be found in moist soil near rivers and streams in tropical regions. 
Fact 2: Caecilians are primitive amphibians that resemble earthworms.
Example Output:
Earthworm-like amphibians live in soil near rivers in tropical regions.