A man walks his bike past a large silver sculpture of a head.
A man is on a self-guided art tour.
A man walking his bike does not imply that he is on a self-guided art tour.
exists e1 s1 x1 x2 x3 x4 x5.(past(e1,x3) & of(x3,x5) & n_head(x5) & n_sculpture(x3) & of(x3,x4) & n_silver(x4) & a_large(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_bike(x2) & of(x2,x1) & n_male(x1) & n_man(x1))
exists p1 x1.(exists s1 x2 x3.(on(x1,x2) & n_tour(x2) & of(x2,x3) & n_art(x3) & a_self-guided(s1) & Theme(s1,x2)) & n_man(x1))