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: Loss of ozone has created an ozone hole over Antarctica. 
Fact 2: ClO is the reactive form of chlorine that triggers ozone loss.

Output: ClO triggers ozone holes.


Input: Consider Input: Fact 1: faulting of rock in Earth 's crust causes earthquakes. 
Fact 2: Earthquakes generate P waves and S waves which can travel throughout the earth.

Output: P-waves and S-waves can be traced back to faulting of rock in Earth's crust.


Input: Consider Input: Fact 1: Most plants grow roots down into the soil to absorb water and minerals. 
Fact 2: Bamboos are vigorous, rugged plants.


Output: bamboo grows roots down into the soil to absorb water and minerals.