a surfer surfs across the large wave.
He surfed on the biggest wave.
A large wave could be the biggest that the observers could see.
exists e1 s1 x1 x2.(n_wave(x2) & a_large(s1) & Theme(s1,x2) & across(e1,x2) & Actor(e1,x1) & v_surf(e1) & n_surfer(x1))
exists e1 s1 x1 x2.(n_wave(x2) & r_most(s1) & a_biggest(s1) & Theme(s1,x2) & n_male(x1) & on(e1,x2) & Actor(e1,x1) & v_surf(e1))