Triple

Target entity: Pearl River estuary
Context triple: [Weiyuan Fort, locatedOn, Pearl River estuary]

• A. Pearl River estuary chosen
  The Pearl River estuary is a major subtropical river mouth in southern China that forms the core of the densely urbanized and economically vital Pearl River Delta region.
• B. Jiulong River estuary
  The Jiulong River estuary is a coastal river mouth in southeastern China that forms a key natural harbor area and access channel for the Port of Xiamen and surrounding maritime activities.
• C. Zengwen River estuary
  The Zengwen River estuary is a coastal wetland area in southern Taiwan known for its rich biodiversity, tidal flats, and role as an important habitat for migratory birds.
• D. Yangtze River estuary
  The Yangtze River estuary is the broad, economically vital river mouth in eastern China where the Yangtze empties into the East China Sea, encompassing major ports and dense coastal development.
• E. Yellow River estuary
  The Yellow River estuary is the dynamic coastal region in northeastern China where the Yellow River empties into the Bohai Sea, characterized by rapidly shifting sediments and evolving deltaic landforms.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.