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.

Example Input: Fact 1: a delta is formed by deposition of sediment at the mouth of a river by water fanning out. 
Fact 2: Rivers provide a water supply.
Example Output: a delta is formed by deposition of sediment at the mouth of a water supply fanning out.

Example Input: Fact 1: medicine is used for curing people when they are sick. 
Fact 2: Drugs are small medicine.
Example Output: drugs can cure people when they are sick.

Example Input: Fact 1: Ants communicate with chemicals called pheromones. 
Fact 2: Pheromones are only found in insects.
Example Output:
insects communicate with chemicals.