Complex sentence: During the 1917 February Revolution, group of Duma members formed the Provisional Committee, which sent commissars to take over ministries and other government institutions, dismissing Tsar-appointed ministries and later formed the Provisional Government under Georgi Lvov.
Split into simpler sentences: During the 1917 February Revolution, group of Duma members formed the Provisional Committee. The committee sent commissars to take over ministries and other government institutions, dismissing Tsar-appointed ministries and later formed the Provisional Government under Georgi Lvov.