Several musicians perform on stage.
Musicians perform.
Performance can be done on the stage.
exists e1 s1 x1 x2.(on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_perform(e1) & n_musician(x1) & a_several(s1) & Theme(s1,x1))
exists e1 x1.(ne_nam_musicians(x1) & Actor(e1,x1) & v_perform(e1))