Mom and her son put together a wooden track for cars.
Mom is tucking son into bed.
If mom is tucking son into bed, they are not putting together a track.
exists e1 p1 x1 x2 x3.(exists s1 s2 x4 x5.(Theme(s2,x4) & a_together(s2) & for(x4,x5) & n_car(x5) & n_track(x4) & a_wooden(s1) & Theme(s1,x4)) & Topic(e1,p1) & Actor(e1,x1) & v_put(e1) & subset_of(x3,x1) & n_son(x3) & of(x3,x2) & n_female(x2) & subset_of(x2,x1) & n_mom(x2))
exists e1 x1 x2 x3.(ne_nam_mom(x1) & into(e1,x3) & n_bed(x3) & Theme(e1,x2) & Actor(e1,x1) & v_tuck(e1) & n_son(x2))