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: condensation causes clouds to form. 
Fact 2: Fog is a cloud that forms on the ground.

Output: condensation causes fog.


Input: Consider Input: Fact 1: Blood pressure is highest in arteries and lowest in veins. 
Fact 2: Apocymarin raises blood pressure.

Output: apocymarin affects veins and arteries.


Input: Consider Input: Fact 1: hitting an object causes the particles in that object to vibrate. 
Fact 2: Sound energy is created by vibrating objects.


Output: hitting an object causes the particles in that object to create sound energy.