Task: Question Generation
Input (English): context: A person is sliding four bricks across four hard surfaces. The first surface is covered with grease, the second surface is covered with concrete, the third surface is covered with ice, and the fourth surface is covered with frost.<sep>group: sliding <sep>question: Which brick slides the shortest distance?<sep>A: grease<sep>B: concrete<sep>C: ice<sep>D: frost
Output (English): The surface covered with concrete is the hardest for the brick to slide across.