Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Gochang, Hwasun and Ganghwa Dolmen Sites' has mentioned 'World' in the following places:
Occurrence Sentence Text Source
Korea is said to contain more than 40% of the world's dolmen, which are mostly concentrated in these three sites.
In Sansuri, Yulchon-myeon, Yeosu, Jeollanam-do, there is a Dolmen, which is presumed to be the largest in the world.
Dolmens are megalithic funerary monuments, which figured prominently in Neolithic and Bronze Age cultures across the world during the 2nd and 1st millennia BCE.