Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Pre-Hispanic City of Teotihuacan' has mentioned 'Valley' in the following places:
Occurrence Sentence Text Source
The city covered eight square miles; 80 to 90 percent of the total population of the valley resided in Teotihuacan.
It is estimated that the total population of the Teotihuacan Valley during this time was approximately 6,000 inhabitants.
During this period, Teotihuacan began to grow into a city as farmers working on the hillside of the Teotihuacan Valley began to move down into the valley, coalescing around the abundant springs of Teotihuacan.
Scholars have speculated that the eruption of the Xitle volcano may have prompted a mass emigration out of the central valley and into the Teotihuacan valley.
Nearby, in the Morelos valley, Xochicalco was sacked and burned in 900 and Tula met a similar fate around 1150.
Teotihuacan and its valley bear unique testimony to the pre-urban structures of ancient Mexico.
The cityxe2x80x99s urban plan integrated natural elements of the Teotihuacan Valley, such as the San Juan River, whose course was altered to cross the Avenue of the Dead.
Teotihuacan and its valley bear unique testimony on the pre-urban structures of ancient Mexico.