A man and his dog riding the surf at the beach.
The man and his dog are sunbathing on the beach.
Riding the surf is different than sunbathing.
exists e1 s1 x1 x2 x3 x4 x5.(n_beach(x5) & n_surf(x4) & a_topic(s1) & subset_of(x2,s1) & at(e1,x5) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & (x2 = x3) & n_dog(x2) & of(x2,x1) & n_male(x1) & subset_of(x1,s1) & n_man(x1))
exists e1 x1 x2 x3 x4.(n_beach(x4) & n_dog(x3) & of(x3,x2) & n_male(x2) & n_man(x2) & on(e1,x4) & Actor(e1,x1) & v_sunbathe(e1) & subset_of(x3,x1) & subset_of(x2,x1))