Complex sentence: The first, in 1824, saw John Quincy Adams elected by the House; the second occurred just 12 years earlier in 1876; while the fourth would occur 112 years later in 2000.
Split into simpler sentences: The first, in 1824, saw John Quincy Adams elected by the House. The second occurred just 12 years earlier in 1876, while the fourth would occur 112 years later in 2000.