A boy in swim trunks does a backflip into the ocean while mountains show through the fog behind him.
The beach is on the West Coast.
Just because there are mountains and fog present by the ocean does not mean that the beach is on the West Coast.
exists e1 p1 x1 x2 x3 x4 x5 x7.(n_male(x5) & n_fog(x7) & n_ocean(x5) & exists e2 x6.(through(e2,x7) & behind(x7,x5) & Actor(e2,x6) & v_show(e2) & n_mountain(x6)) & while(e1,p1) & into(e1,x5) & Theme(e1,x4) & Actor(e1,x1) & v_do(e1) & n_backflip(x4) & in(x1,x2) & n_trunk(x2) & of(x2,x3) & n_swim(x3) & n_boy(x1))
exists p1 x1 x2 x3.(ne_geo_coast(x2) & (x2 = x3) & ne_geo_west(x3) & n_beach(x1) & on(x1,x2))