Little girl in a blue dress riding a red toy tractor.
A girl is riding a tractor
A girl is riding a tractor is too general a statement to describe a little girl in a blue dress riding a red toy tractor.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_tractor(x4) & of(x4,x5) & n_toy(x5) & a_red(s3) & Theme(s3,x4) & (x2 = x3) & n_dress(x2) & a_blue(s2) & Theme(s2,x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_tractor(x2) & n_girl(x1))