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: rocks interacting with wind over long periods of time causes weathering. 
Fact 2: Rock weathering and erosion produces a continuous stream of sediments that are laid down in layers.

Output: rocks interacting with wind produces sediments.


Input: Consider Input: Fact 1: Electron transport is the final stage of aerobic respiration. 
Fact 2: Aerobic respiration is an oxidative process which uses oxygen as a final electron acceptor.

Output: oxygen is used as an electron acceptor in respiration.


Input: Consider Input: Fact 1: if seeds stick to the fur of an animal then that seed will be transported by the animal. 
Fact 2: Burrs and some other seeds have tiny barbs that hook on to cat fur.


Output: if burrs stick to the fur of an animal then burrs will be transported by the animal.