TASK DEFINITION: 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.
PROBLEM: Fact 1: Scientists who find and study fossils are called paleontologists. 
Fact 2: Interest in fossils is worldwide.

SOLUTION: paleontologists study something with worldwide interest.

PROBLEM: Fact 1: Petals attract pollinators to the flower. 
Fact 2: Bees are effective pollinators.

SOLUTION: Bees are attracted to the petals of a flower.

PROBLEM: Fact 1: Mammals took advantage of the extinction of the dinosaurs. 
Fact 2: Early mammals coexisted with dinosaurs throughout the Mesozoic era.

SOLUTION:
mammals existed in the mesozoic era.