Anchor: children playing an informal game of hockey
Entailed: Kids play a pick-up hockey game.
Contradiction: A group of boys complete speed skating drills.
Contradiction: He was glad he didn't have to know this man before.
Contradiction: Both studies and pooling of control group data can help predictions. 
Contradiction: 'Notice a fax in the outher office?'
Contradiction: This country is very big.