Complex sentence: Because Tom was blind, he could not perform work normally demanded of slaves, his owners originally wanted to kill him sense he was no good use to them, but instead he was left to play and explore the Bethune plantation.
Split into simpler sentences: Because Tom was blind, he could not perform work normally demanded of slaves, his owners originally wanted to kill him since he had no economic value to them. Instead, he was left to play and explore the Bethune plantation.