Anchor: More recently, screens have been developed to detect at-risk drinkers.
Entailed: At risk drinkers have been identified by screening.  
Contradiction: There is no screening process to identify at risk drinkers.  
Contradiction: The mill was built in the 1700s, with the rest coming later.
Contradiction: A man is playing music in front of  a wall.
Contradiction: It is all the same.
Contradiction: People watching a chess game.