Complex sentence: Woozy is the pseudonym of renowned Greek street artist/muralist Vaggelis Hoursoglou (born 1979), who has been painting large-scale murals for nearly 20 years in a number of countries around the world.
Split into simpler sentences: Woozy is the tag of renowned Greek street artist/muralist Vaggelis Hoursoglou (born 1979). He has been painting large-scale murals for nearly 20 years in a number of countries around the world.