TASK DEFINITION: In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
PROBLEM: Sentence: For an exothermic chemical reaction, energy is given off as reactants are converted to products. Question: For an exothermic chemical reaction, energy is given off as reactants are converted to what?

SOLUTION: products

PROBLEM: Sentence: The parent element are cations simply named after. Question: What are cations simply named after?

SOLUTION: the parent element

PROBLEM: Sentence: Twice a year often do partial lunar eclipses occur. Question: How often do partial lunar eclipses occur?

SOLUTION:
twice a year