A young man is in a stream with his dirt bike.
a man is a race to the top of the mountain
A man is riding a bike on the top of the mountain
exists p1 s1 x1 x3 x4.(exists x2.(in(x1,x2) & with(x2,x3) & n_stream(x2)) & n_bike(x3) & of(x3,x4) & n_dirt(x4) & of(x3,x1) & n_male(x1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1 x3 x4.(n_mountain(x4) & n_top(x3) & exists x2.((x1 = x2) & to(x2,x3) & of(x3,x4) & n_race(x2)) & n_man(x1))