A man riding a bike in front of a large red wall.
A man rides his bike in a bike race.
A man may ride a bike in front of a large red wall for numerous reasons that have nothing to do with a bike race.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x4) & of(x4,x5) & n_wall(x5) & a_red(s2) & Theme(s2,x5) & a_large(s1) & Theme(s1,x5) & n_front(x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(in(e1,x3) & n_race(x3) & of(x3,x2) & n_bike(x2) & n_bike(x2) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & of(x2,x1) & n_male(x1) & n_man(x1))