Anchor: There has been no Deputy Comptroller General since Bob Keller passed away over two decades ago.
Entailed: Since Bob Keller passed away over twenty years ago, there has been no Deputy Comptroller General.
Contradiction: Bob Keller was replaced by a new Deputy Comptroller General soon after his death.
Contradiction: There aren't many concerns at all. 
Contradiction: A man has a camera.
Contradiction: The work progressed quickly and was finished in record time.
Contradiction: A girl is playing with a toy.