Complex sentence: When the Turkish War of Independence was started, he resigned from his position and he came to Ankara to work with Kemal Atatürk and selected as a member of the representative committee in the Congress of Erzurum on 23rd July, 1919.
Split into simpler sentences: When the Turkish War of Independence was started, he resigned from his position and came to Ankara to work with Kemal Atatürk. He was elected as a member of the representative committee in the Congress of Erzurum on 23rd July, 1919.