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: Organisms that live in marine biomes must be adapted to the salt in the water. 
Fact 2: Marine life is equally diverse and abundant, from tiny plankton to blue whales.
Example Output: blue whales must be adapted to the salt in the water.

Example Input: Fact 1: a speedometer is used for giving a driver feedback on the speed of their vehicle. 
Fact 2: Cars are vehicles and trucks are vehicles.
Example Output: A driver feeds feedback on the speed of their car with a speedometer.

Example Input: Fact 1: Phylogeny is the evolutionary history of a group of related organisms. 
Fact 2: Metazoan phylogeny Phylogeny of phyla is poorly understood.
Example Output:
The evolutionary history of metazoas is poorly understood.