She said the column did not take note of her exact role.

He and his family are thought to be major shareholders, but their exact role is a mystery.

His exact role in the family is yet to be revealed.

He was the other stranger, and she could not discern his exact role here.

His exact role in the design is uncertain (and may continue to remain so).

There has been some controversy as to the exact role of the police authority.

This person did not know the exact role he played.

Later on, the player must perform that exact role to help his past self.

"The only thing we do not know is the exact role he played."

The exact role of these molecules, however, is not currently known.