A man doing a bicycle trick.
A man might be doing a wheelie on his bicycle.
There are many bicycle tricks and the man isn't necessarily doing a wheelie.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & of(x3,x4) & n_bicycle(x4) & (x1 = x2) & n_man(x1))
exists e1 p1 x1 x3.(exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & on(x2,x3) & n_wheelie(x2)) & n_bicycle(x3) & of(x3,x1) & n_male(x1) & Topic(e1,p1) & Actor(e1,x1) & v_might(e1) & n_man(x1))