Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Ombilin Coal Mining Heritage of Sawahlunto' has mentioned 'Mountain' in the following places:
Occurrence Sentence Text Source
Built to exploit the exceedingly rich Ombilin coal deposits, located in the inaccessible mountains of West Sumatra, the Ombilin Coal Mining Heritage of Sawahlunto is an extensive technological ensemble consisting of twelve components located in three functionally-related areas: Area A, consisting of open pit mines and labyrinthine underground mining tunnels together with on-site coal processing facilities, supported by a full-facility purpose-built mining town nearby at Sawahlunto; Area B, an ingeniously engineered rack mountain railway together with numerous rail bridges and tunnels, linking the mines to the coastal seaport, across 155 kilometres of rugged mountain terrain; and Area C, a dredged harbour and newly-constructed seaport at Emmahaven on Sumatra's Indian Ocean coast from where the coal was shipped throughout the Netherlands East Indies and to Europe.
Each of the three areas includes the necessary attributes to understand the integrated system of coal exploitation and transportation xe2x80x93 with its systemic linkage of shaft and tunnel mines, a 155 km long mountain railway system, and seaport.