With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Machu Picchu wasn't part of the largest empire in pre-columbian America.
text_B: The Inca Empire -LRB- Quechua  : Tawantinsuyu , `` The Four Regions '' -RRB- , 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 .. Quechua. Quechua languages. also known. Quechuan and Aymaran spelling shift. pre-Columbian America. pre-Columbian America. The administrative , political and military center of the empire was located in Cusco in modern-day Peru .. Cusco. Cusco. Peru. Peru. The Inca civilization arose from the highlands of Peru sometime in the early 13th century .. Peru. Peru. Inca civilization. Inca civilization. Its last stronghold was conquered by the Spanish in 1572 .. last stronghold. Neo-Inca State. From 1438 to 1533 , the Incas incorporated a large portion of western South America , centered on the Andean Mountains , using conquest and peaceful assimilation , among other methods .. Andean. Andes. At its largest , the empire joined Peru , large parts of modern Ecuador , western and south central Bolivia , northwest Argentina , north and central Chile and a small part of southern Colombia into a state comparable to the historical empires of Eurasia .. Peru. Peru. Ecuador. Ecuador. Bolivia. Bolivia. Argentina. Argentina. central Chile. Incas in Central Chile. Colombia. Colombia. Its official language was Quechua .. Quechua. Quechua languages. Many local forms of worship persisted in the empire , most of them concerning local sacred Huacas , but the Inca leadership encouraged the worship of Inti -- their sun god -- and imposed its sovereignty above other cults such as that of Pachamama .. worship. sun worship. Inti. Inti. sun god. sun god. Pachamama. Pachamama. The Incas considered their king , the Sapa Inca , to be the `` son of the sun . ''. Sapa Inca. Sapa Inca. The Inca Empire was unique in that it lacked many features associated with civilization in the Old World .. Old World. Old World. In the words of one scholar , `` The Incas lacked the use of wheeled vehicles .. They lacked animals to ride and draft animals that could pull wagons and plows ... -LSB- They -RSB- lacked the knowledge of iron and steel ... Above all , they lacked a system of writing ... Despite these supposed handicaps , the Incas were still able to construct one of the greatest imperial states in human history '' .. The Incan economy has been described as `` feudal , slave , socialist -LRB- here one may choose between socialist paradise or socialist tyranny -RRB- . ''. The economy functioned largely without money and without markets .. Instead , exchange of goods and services was based on reciprocity between individuals and among individuals , groups , and Inca rulers .. `` Taxes '' consisted of a labor obligation of a person to the Empire .. The Inca rulers -LRB- who theoretically owned all the means of production -RRB- reciprocated by granting access to land and goods and providing food and drink in celebratory feasts for their subjects .
related.