Complex sentence: Archibald Alexander (1772--October 22,1851) was an American Presbyterian theologian who was a professor at the Princeton Theological Seminary and served for 27 years as that institution's first principal from 1812 to 1840.
Split into simpler sentences: Archibald Alexander (1772--October 22,1851) was an American Presbyterian theologian and professor at the Princeton Theological Seminary. He served for 27 years as that institution's first principal from 1812 to 1840.