Anchor: Behind them are vast groves of banana trees.
Entailed: They have banana trees behind them.
Contradiction: There are no banana trees behind them.
Contradiction: The white animal is swimming in the water
Contradiction: It is wonderful.
Contradiction: Though his city was sacked by Cyrus the Great in 546 b.c., he did not witness the event. 
Contradiction: A racer in the desert