Complex sentence: Thomas Paliser Russell (21 November 1767--21 October 1803) was a co-founder and leader of the United Irishmen was executed for his part in Robert Emmet's rebellion in 1803.
Split into simpler sentences: Thomas Paliser Russell (21 November 1767--21 October 1803) was a co-founder and leader of the United Irishmen. He was executed for his part in Robert Emmet's rebellion in 1803.