Doubtless the writer was interrupted; but there can be no question as to his identity. 
It's obvious the writer was interrupted, but his identity is clear.
We are still not sure about the identity of the writer.
Each pub is exactly like the last.
The little girl is sitting in the grass.
GAO has classification authority for its products.
Girlscouts are selling cookies.
CFO Council has been effective in bringing changes to the working of many organizations across the government.
A gymnast is capture midair while vaulting from the moon