Complex sentence: Made from hollowed out cypress logs, some of the canoes were large enough to seat 60 to 70 passengers, with banks of paddlers, 20-30 per side, with a warrior armed with bow and arrrows stationed between each one.
Split into simpler sentences: Made from hollowed out cypress logs, some of the canoes were large enough to seat 60 to 70 passengers. They had banks of paddlers, 20-30 per side, with a warrior armed with bow and arrrows stationed between each one.