Complex sentence: The lake was named after Benjamin Harvey, who discovered the lake in 1781 and was a member of the Sons of Liberty, an eminent colonial-era group that eventually defeated the notion of Great Britain's Stamp Act.
Split into simpler sentences: The lake was named after Benjamin Harvey, who discovered it in 1781. He was a member of the Sons of Liberty, an eminent colonial-era group that eventually defeated the notion of Great Britain's Stamp Act.