The man, the wife and the son are playing together.
The man is pregent with another baby, but it is not his wife's.
The same subject cannot be a man, wife and son and also just a man.
exists e1 s1 x1 x2 x3 x4 x5.(n_son(x5) & n_wife(x4) & n_man(x2) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & subset_of(x3,x1) & subset_of(x5,x3) & subset_of(x4,x3) & subset_of(x2,x1))
exists s1 x1 x2 x3 x4.(n_wife(x4) & of(x4,x2) & n_male(x2) & n_thing(x2) & n_baby(x2) & n_man(x1) & -exists p1 x5.((x2 = x4) & Time(x4,x5) & n_'s(x5)) & with(s1,x3) & n_baby(x3) & -(x3 = x2) & Theme(s1,x1) & a_pregent(s1))