A bicycle rider flies over a hill while a competitor is not far behind.
A bike rider airborne over a hill with a competitor behind him.
Airborne implies not touching the ground, while flying over a hill could mean that he is just going fast.
exists e1 p1 x1 x2 x3.(exists x4.(-exists s1.(r_far(s1) & Theme(s1,x4) & a_behind(s1)) & n_competitor(x4)) & while(e1,p1) & over(e1,x3) & n_hill(x3) & Actor(e1,x1) & v_fly(e1) & n_rider(x1) & of(x1,x2) & n_bicycle(x2))
exists x1 x2 x3 x4 x5.(a_topic(x1) & over(x1,x4) & with(x4,x5) & behind(x5,x1) & n_male(x1) & n_competitor(x5) & n_hill(x4) & n_airborne(x1) & of(x1,x3) & n_rider(x3) & of(x1,x2) & n_bike(x2))