Complex sentence: Born in Phenix City, Alabama, Glance equalled the then 100 m world record of 9.9 twice in 1976: first on April 3 in Columbia and then a month later in Baton Rouge.
Split into simpler sentences: Born in Phenix City, Alabama, Glance equalled the then 100 m world record of 9.9 twice in 1976. At first on April 3, he ran 9.9 in Columbia and then a month later in Baton Rouge.