Complex sentence: Aleksandra Klejnowska (born December 17,1982) is a Polish weightlifter who competed in the Women's 58 kg at the 2005 World Championships in Doha, Qatar and finished un-ranked because she missed all of her three snatch attempts.
Split into simpler sentences: Aleksandra Klejnowska (born December 17,1982) is a Polish weightlifter. Klejnowska competed in the Women's 58 kg at the 2005 World Championships in Doha, Qatar but finished un-ranked because she missed all of her three snatch attempts.