Complex sentence: Krystyna Nowakowska (born 8 December 1935) is a former Polish female athlete who also represented Poland at the 1960 Summer Olympics in the 800 metres event.
Split into simpler sentences: Krystyna Nowakowska (born 8 December 1935) is a former Polish female athlete. She represented Poland at the 1960 Summer Olympics in the 800 metres event.