Two men fly fishing while standing in a river.
Two men are are fly fishing in the sunset.
Just because two men fly fishing while standing in a river it does not mean it is sunset.
exists e1 e2 x1 x2 x3.(while(e1,e2) & in(e2,x3) & n_river(x3) & Actor(e2,x1) & v_stand(e2) & Time(e1,x2) & n_fishing(x2) & Actor(e1,x1) & v_fly(e1) & n_man(x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3.(n_sunset(x3) & in(p1,x3) & exists x4 x5.((x1 = x4) & n_fishing(x4) & of(x4,x5) & n_fly(x5)) & Actor(e1,x2) & v_be(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))