Complex sentence: Claude Piron (26 February 1931--22 January 2008) is a psychologist and was a translator for the United Nations (from Chinese, English, Russian and Spanish into French) from 1956 to 1961.
Split into simpler sentences: Claude Piron (26 February 1931--22 January 2008) was a psychologist and linguist. He was a translator for the United Nations (from Chinese, English, Russian and Spanish into French) from 1956 to 1961.