Complex sentence: There, he participated in the 500m, 1500m, 3000m, and 5000m events; however, he was out of the top ten in all events but the 500m, where he took fifth place with a time of 38.21.
Split into simpler sentences: There, he participated in the 500m, 1500m, 3000m, and 5000m events. However, he was out of the top ten in all events but the 500m, where he took fifth place with a time of 38.21.