Complex sentence: In December 1964 he joined the staff of the Southern Christian Leadership Conference (SCLC), in Atlanta and was later sent by the SCLC to Selma, Alabama where he was part of the 1965 voting rights campaign there organized and directed by James Bevel.
Split into simpler sentences: In December 1964 he joined the staff of the Southern Christian Leadership Conference (SCLC), first in Atlanta and then in Selma, Alabama. He was part of the 1965 voting rights campaign there organized and directed by James Bevel.