Complex sentence: During the meetings of the "Council of Four" in 1919, British Prime Minister Lloyd George stated that the McMahon-Hussein Correspondence was a treaty obligation and the agreement with Hussein was the basis for the Sykes-Picot Agreement.
Split into simpler sentences: During the meetings of the "Council of Four" in 1919, British Prime Minister Lloyd George stated that the McMahon-Hussein Correspondence was a treaty obligation. He also explained that the agreement with Hussein had been the basis for the Sykes-Picot Agreement.