A girl in the background takes a picture as many people busily walk by .
We doubt that a girl on Wall Street photographs the wall of financiers walking busily to and fro .
We doubt that a girl on Wall Street photographs the wall of financiers walking busily to and fro .
It is certain that a girl on Wall Street photographs the wall of financiers walking busily to and fro .
A girl on Wall Street photographs the wall of financiers walking busily to and fro .