Complex sentence: However, little is known about the political organization of the early peoples of the Tampa Bay area, as the scant historical records come exclusively from the journals and other documents made by members of several Spanish expeditions which traversed the area in the 1500s.
Split into simpler sentences: However, little is known about the political organization of the early peoples of the Tampa Bay area. The scant historical records come exclusively from the journals and other documents made by members of several Spanish expeditions that traversed the area in the 1500s.