context: On July 2 1944, with a radio speech by Prime Minister Linkomies, Germany, an obligation was given to not conclude a separate peace with the USSR. On June 10, the Vyborg offensive operation of Soviet troops begins - on June 20, Vyborg was liberated.
question: When did the Vyborg offensive operation end?
answers.text: 1944, with a radio speech by Prime Minister Linkomies, Germany, an obligation was given to not conclude a separate peace with the USSR. On June 10, the Vyborg offensive operation of Soviet troops begins - on June 20, Vyborg was liberated