Complex sentence: Richard Lawrence (c.1800--June 13,1861) was a house painter and the first known person to attempt to assassinate the President of the United States, when he attempted to shoot President Andrew Jackson outside the United States Capitol on January 30,1835.
Split into simpler sentences: Richard Lawrence (c.1800--June 13,1861) was a house painter and the first known person to attempt to assassinate the President of the United States. Lawrence attempted to shoot President Andrew Jackson outside the United States Capitol on January 30,1835.