children playing at the beach
Children are watching television.
You cannot watch television at the beach because there are no electrical outlets to plug a television set into.
exists e1 x1 x2 x3.(n_beach(x3) & a_topic(x1) & at(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_television(x2) & n_child(x1))