A lady in a blue dress singing.
The dressed up woman performs.
A lady is a woman.  Performs describes the action of singing.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_singing(x2) & of(x2,x3) & n_dress(x3) & a_blue(s1) & Theme(s1,x2) & n_lady(x1))
exists e1 s1 x1 x2.(n_perform(x1) & of(x1,x2) & n_woman(x2) & a_up(s1) & Theme(s1,x1) & Theme(e1,x1) & v_dress(e1) & a_topic(x1))