A man does tricks with his bicycle in a skate park.
A seagull attacked the picnicers.
A man doing tricks with his bicycle in a skate park in no way refers to seagull attacking the picnicers.
exists e1 x1 x2 x3 x4 x5.(in(e1,x4) & n_park(x4) & of(x4,x5) & n_skate(x5) & with(e1,x3) & n_bicycle(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_man(x1))
exists e1 x1 x2.(n_picnicer(x2) & Theme(e1,x2) & Actor(e1,x1) & v_attack(e1) & n_seagull(x1))