A little girl with black pigtails riding a pink bicycle with training wheels.
The girl is riding a bike.
"The girl is riding a bike" is synonymous with "A little girl riding a bicycle," because a bicycle is a synonym for a bike.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6.(a_topic(x1) & with(x1,x2) & with(e1,x5) & n_wheel(x5) & of(x5,x6) & n_training(x6) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_bicycle(x4) & a_pink(s3) & Theme(s3,x4) & (x2 = x3) & n_pigtail(x2) & a_black(s2) & Theme(s2,x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2))