Complex sentence: Shirley Thoms-Bystrynski (12 January 1925-1 July 1999), was an Australian country music singer and pioneer of Australia's country music industry and was known as "Australia's Yodelling Sweetheart".
Split into simpler sentences: Shirley Thoms-Bystrynski (12 January 1925-1 July 1999), was an Australian country music singer and pioneer of Australia's country music industry. She was known as "Australia's Yodelling Sweetheart".