Original sentence: During his study period in the 1930's, Matti Kuusi was involved with nationalist political organizations.He was the first to have introduced the type system of proverbs a la AT System of folklore.In the 1950's, he was appointed as the Professor of Folklore in the University of Helsinki, and later as the member of the Academy of Finland, becoming a nationally celebrated intellectual
Edited sentence: During his study period in the 1930s, Matti Kuusi was involved with nationalist political organizations.He was the first to have introduced the type system of proverbs à la AT System of folklore.In the 1950s, he was appointed as the Professor of Folklore in the University of Helsinki, and later as the member of the Academy of Finland, becoming a nationally celebrated intellectual