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: Sponges are filter feeders. 
Fact 2: Adult sponges are always sessile.
Example Output: A sessile adult can be a filter feeder.

Example Input: Fact 1: Secondary growth forms secondary vascular tissues and bark. 
Fact 2: Trees have the ability to undergo secondary growth and produce a woody body.
Example Output: trees form secondary vascular tissues and bark.

Example Input: Fact 1: Some birds are pollinators that co-evolved with plants. 
Fact 2: Plants spread by self- seeding and below ground stems.
Example Output:
Some birds are pollinators that co-evolved with self seeding organisms.