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.

Q: Fact 1: Bacteria may spread directly from one person to another. 
Fact 2: People can be infected or killed by the bacteria.

A: People can spread death from one person to another.
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Q: Fact 1: Mammals can also generate little bursts of heat by shivering. 
Fact 2: All humans are mammals.

A: humans can generate little bursts of heat by shivering.
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Q: Fact 1: bacteria in soil convert atmospheric nitrogen into a form usable by plants. 
Fact 2: Bacteria are single-celled organisms.

A:
Single-celled organisms in soil convert atmospheric nitrogen into a form usable by plants.
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