A male is riding a bicycle in uneven terrain.
The man is riding on a flat concrete.
The terrain cannot be flat and uneven.
exists e1 s1 x1 x2 x3.(in(e1,x3) & n_terrain(x3) & a_uneven(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_male(x1))
exists e1 s1 x1 x2.(n_man(x1) & on(e1,x2) & n_concrete(x2) & a_flat(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1))