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: soil is formed by rocks eroding. 
Fact 2: Soils are formed by breakdown of rock.
Example Output: rocks eroding causes them to breakdown.

Example Input: Fact 1: Feathers help birds fly and provide insulation. 
Fact 2: Penguins rely on their feathers for insulation.
Example Output: penguins are kept warm with feathers.

Example Input: Fact 1: heating a liquid can be used to identify that liquid 's boiling point. 
Fact 2: Pressure affects the boiling point of a liquid.
Example Output:
Pressure can increase or decrease the boiling point.