A woman in speaking in a theater.
A sad woman in speaking in a theater.
The woman is not necessarily sad.
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_theater(x3) & in(x1,x2) & n_speaking(x2) & n_woman(x1))
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_theater(x3) & in(x1,x2) & n_speaking(x2) & n_woman(x1) & a_sad(s1) & Theme(s1,x1))