instruction:
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.
question:
Fact 1: Cells are programmed to divide only a set number of times. 
Fact 2: Cells reproduce asexually, by dividing.
answer:
Cells are programmed to reproduce only a set number of times.


question:
Fact 1: healing requires rest. 
Fact 2: And, after a full day, relax to a sound and restful sleep in the cool, fresh mountain air.
answer:
Healing requires a sound sleep.


question:
Fact 1: vein deposits of gold and silver are formed by igneous intrusion. 
Fact 2: Jewelry is made of silver, gold or platinum and is usually set with precious stones.
answer:

Silver jewelry could not be made without igneous intrusion.