Complex sentence: Khan migrated to Pakistan in 1947 after Independence of India but he did not like the political turmoil in Pakistan later shifted to Iraq in 1957 and finally to England, settling down in London.
Split into simpler sentences: Khan migrated to Pakistan in 1947 after Independence of India later shifted to Iraq in 1957. But, he did not like the political turmoil in Pakistan, so he moved to Middle East and finally to England, settling down in London.