Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Angkor' has mentioned 'Infrastructure' in the following places:
Occurrence Sentence Text Source
In 2007, an international team of researchers using satellite photographs and other modern techniques concluded that Angkor had been the largest pre-industrial city in the world, with an elaborate infrastructure system connecting an urban sprawl of at least 1,000 square kilometres (390xc2xa0sqxc2xa0mi) to the well-known temples at its core.
However, a specific area of at least 1,000xc2xa0km2 (390xc2xa0sqxc2xa0mi) beyond the major temples is defined by a complex system of infrastructure, including roads and canals that indicate a high degree of connectivity and functional integration with the urban core.
Their inability to adapt their flooding infrastructure may have led to its eventual decline.