Two infants are at play in the yard.
A couple of kids playing tag.
Two infants doesn't imply a couple of kids. Just because two infants play doesn't imply that they are playing tag.
exists p1 x1 x3.(n_yard(x3) & exists x2.(at(x1,x2) & in(x2,x3) & n_play(x2)) & n_infant(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_tag(x4) & (x2 = x3) & n_kid(x2) & n_couple(x1))