Complex sentence: Herman Kruusenberg (23 July 1898--5 June 1970) was a Greco-Roman wrestler from Estonia who competed in the light heavyweight event at the 1920 Summer Olympics.
Split into simpler sentences: Herman Kruusenberg (23 July 1898--5 June 1970) was an Estonian wrestler. He competed in the Greco-Roman light heavyweight event at the 1920 Summer Olympics.