An old woman and a young girl are standing on the deck of a boat.
the man and son were at the deck
Gender contradiction between woman and a girl versus a  man and son.
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_deck(x4) & on(e1,x4) & of(x4,x5) & n_boat(x5) & Actor(e1,x1) & v_stand(e1) & subset_of(x3,x1) & n_girl(x3) & a_young(s2) & Theme(s2,x3) & subset_of(x2,x1) & n_woman(x2) & a_old(s1) & Theme(s1,x2))
exists p1 x1 x2 x3 x4.(n_deck(x4) & n_son(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & at(x1,x4))