A woman holding signs advertising food
A redheaded woman was holding signs advertising food.
Sentence 1 does not mention hair color so you cannot assume that she is redheaded.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_hold(e1) & n_food(x3) & of(x3,x5) & n_advertising(x5) & of(x3,x4) & n_sign(x4) & (x1 = x2) & n_woman(x1))
exists e2 e1 s1 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & Theme(e1,x4) & Actor(e1,x3) & v_advertise(e1) & n_food(x4) & (x2 = x3) & n_sign(x2) & n_woman(x1) & a_redheaded(s1) & Theme(s1,x1))