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: Group 15 of the periodic table is also called nitrogen group. Question: Group 15 of the periodic table is also called which group?

SOLUTION: nitrogen

PROBLEM: Sentence: Calculations are described showing conversions between molar mass and density for gases. Question: Calculations are described showing conversions between molar mass and what for gases?

SOLUTION: density

PROBLEM: Sentence: Planets are held by the force of gravity in elliptical orbits around sun. Question: Planets are held by the force of gravity in elliptical orbits around what?

SOLUTION:
sun