Two bikers are sitting and talking on a bench in front if their bikes.
Two bikers are waiting to pay a toll.
Two bikers sitting and talking on a bench in front if their bikes could not have been waiting to pay a toll.
exists e1 e2 x1 x2 x3 x4 x5.(in(e2,x4) & if(x4,x5) & n_bike(x5) & of(x5,x1) & n_thing(x1) & n_front(x4) & on(e2,x3) & n_bench(x3) & Actor(e2,x2) & v_talk(e2) & n_biker(x2) & card_eq_2(x2) & Actor(e1,x1) & v_sit(e1) & n_biker(x1) & card_eq_2(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_pay(e2) & n_toll(x2)) & n_biker(x1) & card_eq_2(x1))