Complex sentence: Birney was born in Danville, Kentucky, the eldest son of Agatha (McDowell) and James Gillespie Birney, who was a presidential candidate for the Liberty Party in the 1840 and 1844 elections.
Split into simpler sentences: Birney was born in Danville, Kentucky to Agatha (McDowell) and James Gillespie Birney. His father was a presidential candidate for the Liberty Party in the 1840 and 1844 elections.