TASK DEFINITION: In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
PROBLEM: Question: Which crust lies deep inside the ocean? Answer: oldest

SOLUTION: Oldest crust lies deep inside the ocean.

PROBLEM: Question: Secondary pollutants form from chemical reactions that occur when pollution is exposed to what? Answer: sunlight

SOLUTION: Secondary pollutants form from chemical reactions that occur when pollution is exposed to sunlight.

PROBLEM: Question: What causes symptoms associated with sickle-cell disease? Answer: pleiotropic effects

SOLUTION:
Pleiotropic effects causes symptoms associated with sickle-cell disease.