a surfer rides up the wave.
The surfer is surfing in space, and is silver.
Riding up a wave, & riding in space, are two different actions.
exists e1 s1 x1 x2.(n_wave(x2) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_surfer(x1))
exists e1 p1 x1 x2.(n_surfer(x1) & exists x3.((x1 = x3) & n_silver(x3)) & in(e1,x2) & n_space(x2) & Actor(e1,x1) & v_surf(e1))