Input question: "What is defined in physics as ""the product of the mass and velocity of an object""?"

Output answer: momentum

Input question: Which horse won this year's (2007) Cheltenham Gold Cup?

Output answer: kauto star

Input question: Who sculpted the Pieta in the north aisle of St. Peter's Basilica in the Vatican City?

Output answer: michelangelo buonarroti

Input question: What instrument was designed to measure variations in temperature by the expansion or contraction of a liquid or gas?

Output answer:
thermometer