 Complete the following phrase:  On June 21, 1918, Fyodor was approved as the chairman of the Ural Regional Cheka and served as a member of the Ural Regional Soviet led by Alexander Beloborodov. His subordinates in the Cheka included Yakov Yurovsky, Grigory Nikulin, and Mikhail Medvedev-Kudrin. In an autobiography written by Lukoyanov in 1942, he discusses his role in the organization of the 