Complex sentence: Under Reverend Snowden's direction from 1818 to 1850, the May Street Church congregation supported the Underground Railroad; members included several prominent abolitionists, such as David Walker from North Carolina.
Split into simpler sentences: Under Reverend Snowden's direction from 1818 to 1850, the May Street Church congregation supported the Underground Railroad; members included. Sam several prominent abolitionists, such as David Walker from North Carolina.