input question: Determine the topic of the passage. "Tacoma (, ) is a mid-sized urban port city and the county seat of Pierce County, Washington , United States." Topic:???
output answer: Tacoma, Washington

input question: Determine the topic of the passage. "His 1651 book Leviathan established the foundation for most of Western political philosophy from the perspective of social contract theory." Topic:???
output answer: Thomas Hobbes

input question: Determine the topic of the passage. "Developing this idea further, a motorized crane equipped with a drag bucket or clamshell (grabber) that is used to scoop material from the bottom of a body of water is also a dredger." Topic:???
output answer: Dredging

input question: Determine the topic of the passage. "The Geothermal energy of the Earth's crust originates from the original formation of the planet (20%) and from radioactive decay of minerals (80%)." Topic:???
output answer:
Geothermal energy