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 .
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.
It is true that "The skateboarder is riding the ramp", however, neither he nor the ramp are "next to a painting of the Mona Lisa", thus we have contradiction.
It is true that `` The skateboarder is riding the ramp '' , however , neither he nor the ramp are `` next to a painting of the Mona Lisa '' , thus we have contradiction .