Complex sentence: John P. Parker (1827--February 4,1900) was an African-American abolitionist, inventor, iron moulder and industrialist who helped hundreds of slaves to freedom in the Underground Railroad resistance movement based in Ripley, Ohio.
Split into simpler sentences: John P. Parker (1827--February 4,1900) was an American abolitionist, inventor, iron moulder and industrialist. Parker, who was African American, helped hundreds of slaves to freedom in the Underground Railroad resistance movement based in Ripley, Ohio.