Dad and a child lay outdoors on a blanket.
A father and son at a picnic.
One cannot assume that the child belongs to the man or that they are at a picnic.
exists e1 x1 x2 x3 x4 x5.(ne_nam_dad(x2) & on(e1,x5) & n_blanket(x5) & Theme(e1,x4) & Actor(e1,x1) & v_lay(e1) & n_outdoors(x4) & subset_of(x3,x1) & n_child(x3) & subset_of(x2,x1))
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & at(x2,x3) & n_picnic(x3) & n_son(x2) & subset_of(x1,s1) & n_father(x1))