A skateboarder attempts to do a trick over a homemade ramp.
A skater is doing a stunt on camera.
A skateboarder attempting a trick is not necessarily on camera.
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_attempt(e1) & exists e2 x2 x3 x4.(over(e2,x3) & n_ramp(x3) & of(x3,x4) & n_homemade(x4) & Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & n_trick(x2)) & n_skateboarder(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & on(x2,x3) & n_camera(x3) & n_stunt(x2) & n_skater(x1))