A young man wears a helmet and protective clothing as he races his dirt bike through a muddy track.
A young man in a bike race rides his dirt bike along a muddy track.
Racing on a muddy track does not say or imply that the rider is in a bike race.
(-x)
exists e1 s1 s2 x1 x2 x3 x4 x5.(Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & along(x3,x5) & n_track(x5) & a_muddy(s2) & Theme(s2,x5) & n_bike(x3) & n_bike(x3) & of(x3,x4) & n_dirt(x4) & of(x3,x1) & n_male(x1) & in(x1,x2) & n_race(x2) & of(x2,x3) & n_man(x1) & a_young(s1) & Theme(s1,x1))