Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Town of Zabid' has mentioned 'List of World Heritage in Danger' in the following places:
Occurrence Sentence Text Source
It is one of the oldest towns in Yemen, and has been a UNESCO World Heritage Site since 1993; though, in 2000, the site was placed on the List of World Heritage in Danger.
In 2000, Zabid was listed on the List of World Heritage in Danger; the listing was made on the behest of the Yemeni government due to a state of poor upkeep and conservation.