A gentleman walking in the street.
A man is watching tv
Man cannot be watching tv and walking in street at same time.
exists s1 x1 x2.(n_street(x2) & a_topic(x1) & in(x1,x2) & n_walking(x1) & a_gentleman(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_tv(x2) & n_man(x1))