Complex sentence: Jehu Jones, Jr. (1786--1852) was a Lutheran minister who founded one of the first African-American Lutheran congregations in the United States, as well as actively involved in improving the social welfare of blacks.
Split into simpler sentences: Jehu Jones, Jr. (1786--1852) was a Lutheran minister. He founded one of the first African-American Lutheran congregations in the United States, and was actively involved in improving the social welfare of blacks.