A redhead is singing with a backup group on stage.
A redhead singing and performing for a crowd.
Being on stage does not mean she performing nor that there is a crowd around.
exists e1 s1 x1 x2 x3.(with(e1,x2) & on(x2,x3) & n_stage(x3) & n_group(x2) & a_backup(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sing(e1) & n_redhead(x1))
exists e2 e1 x1 x2 x3.(for(e2,x3) & n_crowd(x3) & Actor(e2,x2) & v_perform(e2) & n_redhead(x2) & Actor(e1,x1) & v_sing(e1) & n_redhead(x1))