Complex sentence: The Sednaoui family migrated to Egypt at the end of the 19th century and eventually developed the well-known Egyptian department stores of Cairo that were once the Middle Eastern counterpart of the famous department stores known in London, Paris and New York.
Split into simpler sentences: The Sednaoui family migrated to Egypt at the end of the 19th century. They eventually developed the well-known Egyptian department stores of Cairo that were once the Middle Eastern counterpart of the famous department stores known in London, Paris and New York.