A man with a surfboard is walking his dog as he walks down the beach.
A surfer is walking with his dog to going swimming.
A man walking with a dog on a beach does not imply that he is going swimming.
exists e1 p1 x1 x2 x3 x4.(n_beach(x4) & exists e2 s1.(a_down(s1) & Manner(e2,s1) & Theme(e2,x4) & Actor(e2,x1) & v_walk(e2)) & n_male(x1) & n_male(x1) & as(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_walk(e1) & n_dog(x3) & of(x3,x1) & with(x1,x2) & n_surfboard(x2) & n_man(x1))
exists e1 e2 x1 x2 x3 x4.(with(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_go(e2) & n_swimming(x4) & (x2 = x3) & n_dog(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_walk(e1) & n_surfer(x1))