Complex sentence: Tauno Frans Mustanoja (1912--1996), Professor of English Philology and Literature at the University of Helsinki, Finland, was an internationally recognized philologist and scholar of Medieval and Middle English.
Split into simpler sentences: Tauno Frans Mustanoja (1912--1996) was a professor of English Philology and Literature at the University of Helsinki, Finland. He was a philologist and scholar of Medieval and Middle English.