A female singer and male guitarist on stage.
Man and Woman putting on a show
A female singer and male guitarist on stage does not necessarily imply they are putting on a show.
exists s1 s2 x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_stage(x3) & n_guitarist(x1) & a_male(s2) & Theme(s2,x1) & of(x1,x2) & n_singer(x2) & a_female(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(ne_nam_woman(x3) & ne_nam_man(x2) & on(e1,x4) & n_show(x4) & Actor(e1,x1) & v_put(e1) & subset_of(x3,x1) & subset_of(x2,x1))