Two men are fishing in a river.
Two men wearing caps are fishing in a river.
Just because two men are fishing in a river it does not mean they are wearing caps.
exists e1 x1 x2.(in(e1,x2) & n_river(x2) & Actor(e1,x1) & v_fish(e1) & n_man(x1) & card_eq_2(x1))
exists e2 e1 x1 x2 x3 x4.(in(e2,x4) & n_river(x4) & Actor(e2,x1) & v_fish(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_cap(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))