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: the mass of a planet causes the pull of gravity on that planet. 
Fact 2: Well, weight is the force on a object caused by gravity trying to pull the object down.
Example Output: The mass of a planet causes the weight of objects.

Example Input: Fact 1: being distracted while driving can cause people to crash their car. 
Fact 2: Some children drive their parents to distraction.
Example Output: Children can cause drivers to crash.

Example Input: Fact 1: Mammals can also generate little bursts of heat by shivering. 
Fact 2: Shivering costs the bird, however, by depleting energy stores.
Example Output:
mammals can generate heat by depleting energy stores.