Triple

Target entity: First All-Russian Congress of Soviets
Context triple: [Second All-Russian Congress of Soviets, precededBy, First All-Russian Congress of Soviets]

• A. All-Russian Congress of Soviets chosen
  The All-Russian Congress of Soviets was the supreme governing and legislative assembly of Soviet Russia, composed of delegates from workers', soldiers', and peasants' councils across the country.
• B. First All-Union Congress of Soviets
  The First All-Union Congress of Soviets was the inaugural gathering of delegates from across the former Russian Empire that formally established the Union of Soviet Socialist Republics as a unified federal state.
• C. Second All-Russian Congress of Soviets
  The Second All-Russian Congress of Soviets was the revolutionary assembly of workers', soldiers', and peasants' deputies that convened in Petrograd in October 1917, endorsed the Bolshevik seizure of power, and established the new Soviet government.
• D. Fifth All-Russian Congress of Soviets
  The Fifth All-Russian Congress of Soviets was a key 1918 gathering of Soviet representatives that helped consolidate Bolshevik power during the Russian Civil War and shape the early Soviet state.
• E. 1st Congress of the Russian Social Democratic Labour Party
  The 1st Congress of the Russian Social Democratic Labour Party was the 1898 founding meeting of the Marxist party that later evolved into the ruling Communist Party of the Soviet Union.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.