The people watch the batter.
The people can not see the batter.
Watch and can not see are opposite.
exists e1 x1 x2.(n_batter(x2) & n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_watch(e1))
exists x1 x2.(n_batter(x2) & n_people(x1) & -exists e1 p1.(exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_see(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_can(e1)))