A boy riding a bicycle while another boy and girl watch.
A boy and girl watch a boy ride a bicycle
The boy certainly is riding his bicycle with another boy and a girl watching.
exists e1 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10.(a_topic(x1) & while(e1,x7) & n_watch(x9) & of(x9,x10) & n_girl(x10) & n_boy(x8) & subset_of(x9,x7) & subset_of(x8,x7) & -(x7 = x4) & n_watch(x5) & of(x5,x6) & n_girl(x6) & n_boy(x1) & n_boy(x1) & subset_of(x5,x4) & subset_of(x1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bicycle(x3) & (x1 = x2))
exists x1 x2 x3.(all x4.(n_bicycle(x4) -> exists e1 x5 x6.(Theme(e1,x5) & Actor(e1,x1) & v_watch(e1) & for(x5,x4) & n_ride(x5) & of(x5,x6) & n_boy(x6))) & n_girl(x3) & n_boy(x2) & subset_of(x3,x1) & subset_of(x2,x1))