Family taking a winter walk in a park path while two of the children run ahead of the family.
The children are twin brothers.
Two children are not always twin brothers.
exists e1 p1 x1 x2 x3 x4 x5 x7 x8.(n_family(x8) & n_child(x7) & ne_nam_family(x1) & exists e2 x6.(of(e2,x8) & r_ahead(e2) & Actor(e2,x6) & v_run(e2) & of(x6,x7) & n_thing(x6) & card_eq_2(x6)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & in(x2,x4) & n_path(x4) & of(x4,x5) & n_park(x5) & n_walk(x2) & of(x2,x3) & n_winter(x3))
exists p1 x1.(n_child(x1) & exists s1 x2.((x1 = x2) & n_brother(x2) & a_twin(s1) & Theme(s1,x2)))