A man on a bike sitting in traffic.
the man is trying to deliver a pizza
Not all man on a bike sitting in traffic is trying to deliver a pizza.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & in(e1,x4) & n_traffic(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_bike(x2) & n_man(x1))
exists e1 p1 x1.(n_man(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_deliver(e2) & n_pizza(x2)))