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: Ribosomes are small organelles where proteins are made. 
Fact 2: Ribosomes are assembled inside the nucleus.

Output: Proteins are made inside the nucleus.


Input: Consider Input: Fact 1: Chemical bonds form when substances react with one another. 
Fact 2: All substances are composed of molecules.

Output: Chemical bonds form when molecules react with one another.


Input: Consider Input: Fact 1: contact between rocks over long periods of time causes rocks to smooth. 
Fact 2: Underfoot, loose rocks make footing perilous, while smooth marblelike stones make it slippery.


Output: contact between rocks over long periods of time causes rocks to be slippery.