Anchor: Therefore, USEPA recommends the use of the $ 0.5 dilution factor (see Section 4, Quality Assurance).
Entailed: The dilution factor used.
Contradiction: The factor is recommended to be $0.25
Contradiction: A cat is playing ball.
Contradiction: Wheelchair basketball players.
Contradiction: Marion Slaughter was the son of a tailor. 
Contradiction: Siena lies to the south.