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: Butter is a fat that is a solid at room temperature. 
Fact 2: Some fats are more likely to cause heart disease.
Example Output: butter can lead to heart disease.

Example Input: Fact 1: a scale is used for measuring weight. 
Fact 2: All weights are in grams.
Example Output: a scale is used for measuring grams.

Example Input: Fact 1: Organs of excretion make up the excretory system. 
Fact 2: Excretory system is composed of a dorsal excretory gland and a pair of Malpighian tubules.
Example Output:
Malpighian tubules are organs of excretion.