Complex sentence: Petrus Särkilahti (a.k.a. Pietari Särkilahti, sometimes written as "Petrus Saerkilahti") (died 1529) was a Finnish student of Martin Luther and one of the early pioneers of teaching science in Finnish language.
Split into simpler sentences: Petrus Särkilahti (a.k.a. Pietari Särkilahti), sometimes written as "Petrus Saerkilahti", died in 1529. He was a Finnish student of Martin Luther and one of the early pioneers of teaching science in Finnish language.