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: if something is outside during the day then that something will receive sunlight. 
Fact 2: Sunlight is made of both UVA and UVB rays.
Example Output: if something is outside during the day then it will receive UVA and UVB rays.

Example Input: Fact 1: Cartilage is a tough tissue that contains a protein called collagen. 
Fact 2: Membranes attached to the cricoid cartilage .
Example Output: Cricoid is a tough tissue that contains a protein called collagen.

Example Input: Fact 1: propulsion is used for flying by a spacecraft. 
Fact 2: Apollo 13 spacecraft is launched.
Example Output:
Propulsion was used for flying Apollo 13.