Complex sentence: She also held the one mile African record of 4:20.79, set in 1991 in Oslo, for 17 years until it was beaten by Gelete Burika of Ethiopia, who timed 4:18.23 in 2008.
Split into simpler sentences: She also held One mile African record of 4:20.79 set in 1991 in Oslo. The record was beaten 17 years later by Gelete Burika of Ethiopia, who timed 4:18.23 in 2008.