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physical object > person > scientist > Copernicus

Copernicus
subject			fact

Copernicus	has contribution the Copernican model of the solar system with the sun at its center
	is an instance of scientist
scientist	has greatest achievement
	has career
person	has birth date
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material