Complex sentence: Pekka Salminen (born 1937) is a Finnish Professor of Architecture and founder and a senior partner of PES Architects, formed in 1968, in Helsinki, Finland.
Split into simpler sentences: Pekka Salminen (born 1937) is a Finnish Professor of Architecture. He is the founder and a senior partner of PES Architects, formed in 1968, in Helsinki, Finland.