Two men playing trumpet in public in the city.
The men are watching a performance.
The men cannot be both playing a trumpet (presumably performing) and watching a performance.
exists e1 x1 x2 x3 x4 x5.(n_city(x5) & a_topic(x1) & in(e1,x5) & in(e1,x4) & n_public(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_trumpet(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_performance(x2))