Triple

Target entity: Russo-Japanese War peace negotiations
Context triple: [Takahira Kogorō, participantIn, Russo-Japanese War peace negotiations]

• A. Treaty of Portsmouth chosen
  The Treaty of Portsmouth was the 1905 peace agreement, mediated by U.S. President Theodore Roosevelt in New Hampshire, that ended the Russo-Japanese War and marked Japan’s emergence as a major world power.
• B. Russo-Japanese War
  The Russo-Japanese War was a 1904–1905 conflict between the Russian Empire and Japan over rival imperial ambitions in Manchuria and Korea, notable as the first major victory of an Asian power over a European one in modern times.
• C. Russian lease of Liaodong Peninsula
  The Russian lease of the Liaodong Peninsula was a late 19th-century imperial concession that granted the Russian Empire control over Port Arthur and surrounding areas in northeastern China, significantly expanding its influence in East Asia and intensifying great-power rivalries in the region.
• D. Sakhalin–Kuril Exchange
  The Sakhalin–Kuril Exchange is the common name for the 1875 Treaty of Saint Petersburg between Japan and Russia, which settled territorial disputes by redefining control over Sakhalin and the Kuril Islands.
• E. Treaty of Ouchy
  The Treaty of Ouchy was the 1912 peace agreement between Italy and the Ottoman Empire that ended the Italo-Turkish War and led to Italian control over Libya and the Dodecanese Islands.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.