A guy surfing in the ocean.
A man is surfing with his yellow board.
The board may not be yellow.
exists x1 x2 x3.(n_ocean(x3) & a_topic(x1) & in(x1,x3) & Time(x1,x2) & n_surfing(x2) & n_guy(x1))
exists e1 s1 x1 x2.(with(e1,x2) & n_board(x2) & a_yellow(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_surf(e1) & n_man(x1))