The man on the bike is riding next to a man holding a dog.
A man bringing his dog to the vet.
The may may be taking his dog somewhere other than to the vet.
exists e2 e1 x1 x2 x3 x4.(n_bike(x2) & to(e1,x1) & Theme(e2,x4) & Actor(e2,x3) & v_hold(e2) & n_dog(x4) & (x1 = x3) & n_man(x1) & n_man(x1) & r_next(e1) & Actor(e1,x1) & v_ride(e1) & on(x1,x2))
exists e1 x1 x2 x3 x4.(n_vet(x4) & a_topic(x1) & to(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_bring(e1) & n_dog(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_man(x1))