A surfer catches a wave and tries to hold on as the surf collapses around him.
A spectator is watching people surf.
One subject is a surfer and the other is a spectator.  The surfer catches a wave but the spectator is watching.
exists e1 e2 p1 x1 x2 x3 x4.(n_surf(x4) & Topic(e2,p1) & Actor(e2,x3) & v_try(e2) & exists e3 p2 s1.(exists e4.(Actor(e4,x4) & v_collapse(e4)) & as(e3,p2) & a_on(s1) & Manner(e3,s1) & around(e3,x1) & Actor(e3,x3) & v_hold(e3)) & n_male(x1) & n_surfer(x3) & Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & n_wave(x2) & n_surfer(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & Time(x2,x3) & n_surf(x3) & n_people(x2) & n_spectator(x1))