Pedestrians walking past a 50% off sale.
A group of men ice fishing.
One does not find a sale while one is ice fishing.
exists e1 x1 x2 x3 x4.(a_topic(x1) & past(e1,x3) & off(x3,x4) & n_sale(x4) & n_percent(x3) & card_eq_50(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_pedestrian(x1))
exists x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & n_fishing(x2) & of(x2,x4) & n_ice(x4) & of(x2,x3) & n_man(x3) & n_group(x1))