A female singer and a male saxophonist are performing on stage.
A singer and a saxophonist are performing on stage.
A singer and a saxophonist performing on stage are doing just that.
exists e1 s1 s2 x1 x2 x3 x4.(on(e1,x4) & n_stage(x4) & Actor(e1,x1) & v_perform(e1) & subset_of(x3,x1) & n_saxophonist(x3) & a_male(s2) & Theme(s2,x3) & subset_of(x2,x1) & n_singer(x2) & a_female(s1) & Theme(s1,x2))
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_stage(x4) & Actor(e1,x1) & v_perform(e1) & subset_of(x3,x1) & n_saxophonist(x3) & subset_of(x2,x1) & n_singer(x2))