A bicyclist performing a trick over a heavily graffitied wall.
A cyclist is flipped upside down over a wall.
Performing a trick over a wall doesn't imply being flipped upside down over it.
exists e1 e2 x1 x2 x3 x4.(a_topic(x1) & over(e1,x4) & n_wall(x4) & Theme(e2,x4) & v_graffity(e2) & r_heavily(x4) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_trick(x3) & (x1 = x2) & n_bicyclist(x1))
exists e1 p1 x1 x2.(over(e1,x2) & n_wall(x2) & exists s1.(r_upside(s1) & Theme(s1,x1) & a_down(s1)) & Recipient(e1,p1) & Topic(e1,x1) & v_flip(e1) & n_cyclist(x1))