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.

Fact 1: Humans have collected and grown mushrooms for food for thousands of years. 
Fact 2: Foods rich in chlorine are mushrooms, parsley, sweet potato, rhubarb, and especially tomato.
Humans have collected and grown foods rich in chlorine for thousands of years.

Fact 1: Organisms that live in marine biomes must be adapted to the salt in the water. 
Fact 2: Another animal that lives within the Marine Biome is a sea tiger.
Sea tigers must adapt to the salt in the water.

Fact 1: Most amphibians breathe with gills as larvae and with lungs as adults. 
Fact 2: All frogs are amphibians.

Frogs breathe with gills as larvae and with lungs as adults.