A woman with red-hair is singing.
There is someone with red hair.
A woman with red-hair can be described as someone with red hair.
exists e1 x1 x2.(Actor(e1,x1) & v_sing(e1) & with(x1,x2) & n_red-hair(x2) & n_woman(x1))
exists p1 x1 s1 x2 x3.((x1 = x2) & with(x2,x3) & n_hair(x3) & a_red(s1) & Theme(s1,x3) & n_person(x2))