Triple

Target entity: second Mongol invasion of Japan
Context triple: [Mongol invasions of Japan, hasPart, second Mongol invasion of Japan]

• A. Mongol invasions of Japan chosen
  The Mongol invasions of Japan were two failed 13th-century military campaigns by the Mongol-led Yuan dynasty that were famously repelled in part by typhoons later termed "kamikaze" or divine winds.
• B. Mongol invasion of the Korean Peninsula
  The Mongol invasion of the Korean Peninsula was a series of 13th-century military campaigns in which the Mongol Empire attacked and eventually subjugated the Goryeo kingdom, integrating it into the Mongol sphere of influence.
• C. Sakhalin invasion
  The Sakhalin invasion was a 1905 Japanese military campaign in the Russo-Japanese War in which Japan seized control of Russia’s Sakhalin Island.
• D. Mongol invasion of China
  The Mongol invasion of China was a series of 13th-century campaigns through which the Mongol Empire conquered and unified the Chinese territories under its rule, culminating in the establishment of the Yuan dynasty.
• E. Mongol invasion of Vietnam
  The Mongol invasion of Vietnam was a series of 13th-century military campaigns by the Mongol Empire against the Đại Việt kingdom that were ultimately repelled, contributing to the limits of Mongol expansion in Southeast Asia.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.