Complex sentence: Olga Imerslund (9 April 1907--23 August 1987) was a renowned Norwegian pediatrician best known for her contribution to identification and naming of the Imerslund-Gräsbeck syndrome.
Split into simpler sentences: Olga Imerslund (9 April 1907--23 August 1987) was a renowned Norwegian pediatrician. She is best known for her contribution to identification and naming of the Imerslund-Gräsbeck syndrome.