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: detailed observation of celestial objects requires a telescope. 
Fact 2: All telescopes collect light and magnify it .
Example Output: Detailed observation of celestial objects requires the collecting of light and magnifying it.

Example Input: Fact 1: mechanical weathering is when rocks are broken down by mechanical means. 
Fact 2: Ice wedging is the most important form of mechanical weathering.
Example Output: rocks can be broken down from ice wedging.

Example Input: Fact 1: a rubber band snapping causes the particles in the rubber band to vibrate. 
Fact 2: Elastics are rubber bands that connect the upper and lower braces.
Example Output:
An elastic snapping causes the particles in the elastic to vibrate.