Anchor: Four men play music on stringed instruments.
Entailed: The men are playing music.
Contradiction: Four men are playing woodwind instruments.
Contradiction: Information on Beppu's sex museum can be found in all pertaining literature.
Contradiction: The number of troubled youths is over 5000 with their ages around 12 years old. 
Contradiction: Four men are playing basketball.
Contradiction: I have two reasons for including it here, both beneficial.