Complex sentence: Anthony D. Smith (born 1939) is a British Ethnographer, and Professor Emeritus of Nationalism and Ethnicity at the London School of Economics, and is considered one of the founders of the interdisciplinary field of nationalism studies.
Split into simpler sentences: Anthony D. Smith (born 1939) is a British ethnographer who is Professor Emeritus of Nationalism and Ethnicity at the London School of Economics. He is considered one of the founders of the interdisciplinary field of nationalism studies.