Complex sentence: The story of "I Love Lisa" originated from a personal episode of Al Jean's life; when Jean was in third grade, he got a valentine from a girl that read "I Choo-Choo-Choose You".
Split into simpler sentences: The story of "I Love Lisa" originated from a personal episode of Al Jean's life. When Jean was in third grade, he got a valentine from a girl that read "I Choo-Choo-Choose You".