A person rides a bike off the top of a hill and is airborne.
They are riding very fast.
A person rides a bike off the top of a hill and is airborne does not indicate that They are riding very fast.
exists e1 s1 x1 x2 x3 x4 x5.(n_top(x3) & Theme(s1,x5) & a_airborne(s1) & n_person(x5) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & off(x2,x3) & of(x3,x4) & n_hill(x4) & n_bike(x2) & n_person(x1))
exists e1 s1 x1.(n_thing(x1) & r_very(e1) & a_fast(s1) & Manner(e1,s1) & Actor(e1,x1) & v_ride(e1))