Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Old Walled City of Shibam' has mentioned 'World' in the following places:
Occurrence Sentence Text Source
Shibam is often called "the oldest skyscraper city in the world".
[17] The city has some of the tallest mud buildings in the world, with some of them over 30xc2xa0m (98 feet) high,[18] thus being early high-rise apartment buildings.