Old lady crosses the street in the city.
The lady is not a teenager.
And Old Lady is generally used to refer to a woman who is much older than a teenage, and so cannot be a teenager.
exists e1 s1 x1 x2 x3.(n_city(x3) & n_street(x2) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_cross(e1) & n_lady(x1) & a_old(s1) & Theme(s1,x1))
exists x1.(n_lady(x1) & -exists p1 x2.((x1 = x2) & n_teenager(x2)))