Triple

Target entity: Soviet Barvenkovo–Lozovaya offensive
Context triple: [Operation Fredericus, precededBy, Soviet Barvenkovo–Lozovaya offensive]

• A. Barvenkovo–Lozovaya offensive chosen
  The Barvenkovo–Lozovaya offensive was a World War II Red Army operation in early 1942 aimed at expanding the Izium salient in eastern Ukraine, which ultimately set the stage for the later encirclement at the Second Battle of Kharkov.
• B. Velikiye Luki offensive
  The Velikiye Luki offensive was a major Soviet World War II operation in late 1942–early 1943 aimed at encircling and recapturing the strategically important city of Velikiye Luki from German forces.
• C. Polesskoe offensive
  The Polesskoe offensive was a World War II Red Army operation in early 1944 aimed at pushing German forces out of the Polesia region as part of the broader Soviet spring offensives on the Eastern Front.
• D. Pskov-Ostrov Offensive
  The Pskov-Ostrov Offensive was a World War II Soviet military operation in 1944 aimed at driving German forces from the Pskov and Ostrov regions as part of the broader campaign to liberate northwestern Russia.
• E. Rogachev–Zhlobin Offensive
  The Rogachev–Zhlobin Offensive was a World War II Soviet military operation in early 1944 aimed at liberating parts of Belarus from German occupation as part of the broader Dnieper–Carpathian strategic offensive.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.