Three ladies sewing on a bench.
Three ladies are making a quilt.
There's no information in sentence 1 that would lead you to believe that they are making a quilt.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_bench(x3) & Actor(e1,x2) & v_sew(e1) & (x1 = x2) & n_lady(x1) & card_eq_3(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_quilt(x2) & n_lady(x1) & card_eq_3(x1))