The collie is running down a blue and yellow board.
The dog is navigating an obstacle.
Not all dogs running down is navigating an obstacle.
exists e1 s1 s2 s3 x1 x2.(n_collie(x1) & a_down(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_run(e1) & n_board(x2) & a_yellow(s2) & Theme(s2,x2) & a_blue(s1) & Theme(s1,x2))
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_navigate(e1) & n_obstacle(x2))