The skateboarder is riding the ramp next to the very big painting.
The skateboarder is riding the ramp next to a painting of the Mona Lisa.
Not all skateboarders ride a ramp next to the Mona Lisa.
exists e1 s1 x1 x2 x3.(n_painting(x3) & a_big(s1) & Theme(s1,x3) & r_very(x3) & n_ramp(x2) & n_skateboarder(x1) & to(e1,x3) & r_next(e1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))
exists e1 x1 x2 x3 x4 x5.(ne_geo_lisa(x4) & (x4 = x5) & ne_geo_mona(x5) & n_ramp(x2) & n_skateboarder(x1) & to(e1,x3) & of(x3,x4) & n_painting(x3) & r_next(e1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))