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: rocks interacting with wind over long periods of time causes weathering. 
Fact 2: Rocks weather at different rates.

Ex Output:
wind affects rocks.


Ex Input:
Fact 1: detailed observation of celestial objects requires a telescope. 
Fact 2: Telescopes Telescopes Telescopes and microscopes both use two lenses to produce magnified images.

Ex Output:
Two lenses to produce magnified images allow for detailed observation of celestial objects.


Ex Input:
Fact 1: Most salamanders use their sense of smell to find a mate. 
Fact 2: Like frogs, salamanders are amphibians.

Ex Output:

some amphibians use their sense of smell to find a mate.