A man is building a large sand castle on the beach.
A man is competing in a sand castle building contest.
The fact that man is building a large sand castle on the beach doesn't imply that he is competing in a sand castle building contest.
exists e1 s1 x1 x2 x3 x4.(n_beach(x4) & on(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_castle(x2) & of(x2,x3) & n_sand(x3) & a_large(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3 x4 x5.(in(e1,x2) & n_contest(x2) & of(x2,x5) & n_building(x5) & of(x2,x4) & n_castle(x4) & of(x2,x3) & n_sand(x3) & Actor(e1,x1) & v_compete(e1) & n_man(x1))