A family sitting watching the tv.
The family is about to watch a movie.
A family can watch TV but not necessarily be watching a movie.
exists e2 e1 x1 x2 x3.(n_tv(x3) & a_topic(x1) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x2) & v_watch(e2) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_family(x1))
exists p1 s1 x1.(n_family(x1) & Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_movie(x2)))