Premise: The Inca Empire ( Quechua : Tawantinsuyu , `` The Four Regions '' ) , also known as the Incan Empire and the Inka Empire , was the largest empire in pre-Columbian America , and possibly the largest empire in the world in the early 16th century . Machu Picchu ( [ ˈmatʃu ˈpitʃu ] ) ( Machu Pikchu [ ˈmɑtʃu ˈpixtʃu ] ) is a 15th-century Inca citadel situated on a mountain ridge 2430 m above sea level .
Hypothesis: Machu Picchu was part of an empire in pre-columbian America.
Label: ENTAILMENT