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: Cells cannot survive without oxygen. 
Fact 2: Survival is to live, to live means hope.
Example Output: Cells cannot live without oxygen.

Example Input: Fact 1: rain causes erosion. 
Fact 2: With the rain comes floods, and with the floods come erosion and landslides.
Example Output: rain can cause landslides.

Example Input: Fact 1: Antigens are found on cancer cells and the cells of transplanted organs. 
Fact 2: Organs such as the stomach and liver also begin to develop.
Example Output:
antigens are found on cancer cells and the cells of transplanted livers.