Elizabeth Brackett, a longtime Chicago journalist and world-champion triathlete, has died four days after an apparent bicycle accident. She was 76. PBS affiliate WTTW, where Brackett hosted ``Chicago Tonight'' for two decades, said on its website Brackett died in the hospital surrounded by family members. Brackett had been in a coma with a fractured vertebra in her neck following the apparent fall Wednesday morning near the city's lakefront bike trail. She had been training for a triathlon. As a world-champion triathlete, Brackett had won five international titles in her age group _ including last year in Rotterdam, Netherlands. The Emmy-winning host and correspondent covered the 1980 Democratic convention, 1986 Challenger disaster and championship seasons for the NBA's Chicago Bulls. She also served as the Midwest correspondent for PBS' MacNeil\/Lehrer NewsHour.