The man is dirt bike riding is the stream and climbing the rocks on the bank of the water.
A man rides his bike through the wilderness.
'climbing the rocks' indicates ' wilderness.
exists p1 p2 x1 x2 x6 x8 x9 x10.(n_water(x10) & n_bank(x9) & n_rock(x8) & n_stream(x6) & n_man(x1) & exists e1 x5 x7.((x1 = x5) & subset_of(e1,x5) & on(e1,x9) & of(x9,x10) & Theme(e1,x8) & Actor(e1,x7) & v_climb(e1) & n_thing(x7) & subset_of(x6,x5)) & exists s1 x3 x4.((x2 = x3) & n_riding(x3) & of(x3,x4) & n_bike(x4) & a_dirt(s1) & Theme(s1,x3)) & (x1 = x2))
exists e1 x1 x2 x3.(n_wilderness(x3) & through(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_man(x1))