sentences:  It was signed by Joachim von Ribbentrop and Vyacheslav Molotov, the foreign ministers of Germany and the Soviet Union respectively, in the presence of Joseph Stalin.Only a small portion of the protocol, which superseded the first treaty, was publicly announced while the spheres of influence of Nazi Germany and the Soviet Union remained classified.The third secret protocol of the Pact was signed on January 10, 1941, by Friedrich Werner von Schulenburg, and Molotov, wherein Germany renounced its claims to portions of Lithuania, only a few months before their anti-Soviet Operation Barbarossa.