Triple

Target class: 长城关隘
Context triple: [居庸关, instanceOf, 长城关隘]

• A. 中国文物建筑
  中国文物建筑是指具有重要历史、艺术和科学价值，能够反映中国不同时期社会发展、文化传统与建筑技艺的受法律保护的历史建筑与遗存。
• B. line of fortifications chosen
  A line of fortifications is a connected series of defensive structures, such as walls, trenches, and strongpoints, designed to protect a territory or position by forming a continuous or coordinated barrier against attack.
• C. 山丘
  山丘是指地势高于周围地面的中小型隆起地形，通常坡度较缓、高度低于山脉。
• D. ancient Chinese city
  An ancient Chinese city is a fortified urban center that served as a political, economic, military, and cultural hub, characterized by planned layouts, defensive walls, gates, palaces, temples, markets, and residential quarters reflecting traditional Chinese cosmology and social hierarchy.
• E. fortified bridge
  A fortified bridge is a defensive structure that combines a crossing over a waterway or ravine with military features such as towers, battlements, and gates to control passage and resist attack.
• F. None of above.