Complex sentence: James Long (filibuster) (born 9 February 1793 Culpepper County Virginia died 11 May 1822 in Mexico) who led the unsuccessful filibuster Long Expedition to Texas was the first President of the first Republic of Texas.
Split into simpler sentences: James Long (filibuster) (born 9 February 1793 Culpepper County Virginia died 11 May 1822 in Mexico) led the unsuccessful filibuster Long Expedition to Texas. He was the first President of the first Republic of Texas.