Complex sentence: On March 29,1968, King went to Memphis, Tennessee, in support of the black sanitary public works employees, represented by AFSCME Local 1733, who had been on strike since March 12 for higher wages and better treatment.
Split into simpler sentences: On March 29,1968, King went to Memphis, Tennessee, in support of the black sanitary public works employees, who were represented by AFSCME Local 1733. The workers had been on strike since March 12 for higher wages and better treatment.