Anchor: The Great Famine struck in 1845 with a blight on the staple food of the poor, the potato.
Entailed: The potato is the staple food of the poor. 
Contradiction: The Great Famine struck in 1780. 
Contradiction: Postal Service's volume data is reported in one batch.
Contradiction: There is a higher priority on certain programs.
Contradiction: Hatfield has never used a source.
Contradiction: The horse's legs are walking in water.