Complex sentence: At midday, the sun finally came out for a few hours, the track dried, and the race was finally started at 2:10 p.m. The grandstands were only partially full as the field took the green flag.
Split into simpler sentences: At midday, the sun finally came out for a few hours, and the track surface dried. The race finally was able to get started at 2:10 p.m. The grandstands were only partially full as the field took the green flag.