An African American man in a brown shirt is singing on a stage.
A black man performing onstage.
An African American man is the same as a black man and singing on stage is performing on stage.
exists e1 s1 s2 s3 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Actor(e1,x1) & v_sing(e1) & in(x1,x2) & n_shirt(x2) & a_brown(s3) & Theme(s3,x2) & n_man(x1) & a_american(s2) & Theme(s2,x1) & a_african(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_onstage(x3) & (x1 = x2) & n_man(x1) & a_black(s1) & Theme(s1,x1))