A couple play in the tide with their young son.
The family is sitting down for dinner.
The family cannot simultaneously be playing in the tide and sitting down to dinner
exists s1 x1 x2 x3 x4.(n_son(x4) & a_young(s1) & Theme(s1,x4) & of(x4,x3) & n_thing(x3) & n_tide(x3) & a_topic(x1) & with(x1,x4) & in(x1,x3) & n_play(x1) & of(x1,x2) & n_couple(x2))
exists e1 s1 x1 x2.(n_family(x1) & for(e1,x2) & n_dinner(x2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))