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: a sifter is used for separating mixtures. 
Fact 2: For the seasoning mixture combine all ingredients.

Output: a sifter is used for separating combined ingredients.


Input: Consider Input: Fact 1: fire converts chemical energy into light and heat energy. 
Fact 2: Fuel has a chemical energy.

Output: Fire converts fuel into light and heat energy.


Input: Consider Input: Fact 1: fog is formed by water vapor condensing in the air. 
Fact 2: Fog When driving, fog is an obstacle or a hindrance that makes things obscure.


Output: hindrances to driving are formed by water vapor condensing in the air.