A middle-aged woman is repairing a part under the hood of her car.
A woman is a professional mechanic.
A woman performing car repairs does not imply being a professional mechanic.
exists e1 s1 x1 x2 x3 x4.(n_car(x4) & of(x4,x3) & n_female(x3) & n_hood(x3) & under(e1,x3) & of(x3,x4) & Theme(e1,x2) & Actor(e1,x1) & v_repair(e1) & n_part(x2) & n_woman(x1) & a_middle-aged(s1) & Theme(s1,x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_mechanic(x2) & a_professional(s1) & Theme(s1,x2)) & n_woman(x1))