The man , only visible as a black silhouette , took a picture along a brightly colored wall full of graffiti .
It is certain that the graffiti artist is posing in front of his work .
There is little chance that the graffiti artist is posing in front of his work .
It is certain that the graffiti artist is posing in front of his work .
The graffiti artist is posing in front of his work .