text: Most knowledge about this city is derived from a Bernardino de Sahagun text held at a library in Florence.
full_question: Most knowledge about this city is derived from a Bernardino de Sahagun text held at a library in Florence. This city had districts called "calpulli." It was surrounded by floating farms called chinampas. The ruins of this city's destroyed religious center are now covered by the Zocalo. Captives would be paraded into this city after successful "Flower Wars." An invading army fled this city in La Noche Triste. This city formed a triple alliance with Texcoco and Tlacopan and was legendarily founded on a site where an eagle was seen perched on a cactus. Hernando Cortez conquered, for 10 points, what city ruled by emperors named Montezuma, the capitol of the Aztec Empire?
first_sentence: Most knowledge about this city is derived from a Bernardino de Sahagun text held at a library in Florence.
raw_answer: Tenochtitlan [or Mexico-Tenochtitlan; do not accept or prompt on Mexico City]