Anchor: A college student texts a message to her boyfriend while she waits for her next class to start.
Entailed: A student waits for her next class to start, and texts her boyfriend while waiting.
Contradiction: A woman rows a boat down the river.
Contradiction: Two people are sitting down
Contradiction: A stock market crash would cripple the economy. 
Contradiction: two women play basketball
Contradiction: Dole traded his 47 year old wife for a 39 year old.