An accordion player accompanies a man and woman who are dancing a tango on a city street as several passersby watch.
Nobody is dancing.
If nobody is dancing, it cannot also be said that a man and a woman are dancing.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10.(Theme(e2,x3) & Actor(e2,x1) & v_accompany(e2) & as(e1,x10) & n_watch(x10) & a_passersby(s2) & Theme(s2,x10) & a_several(s1) & Theme(s1,x10) & on(e1,x8) & n_street(x8) & of(x8,x9) & n_city(x9) & Theme(e1,x7) & Actor(e1,x6) & v_dance(e1) & n_tango(x7) & (x3 = x6) & n_woman(x5) & n_man(x4) & subset_of(x5,x3) & subset_of(x4,x3) & n_player(x1) & of(x1,x2) & n_accordion(x2))
-exists e1 x1.(Actor(e1,x1) & v_dance(e1) & n_person(x1))