Anchor: people row in a crew boat.
Entailed: The people are rowing in a boat
Contradiction: The people are fighting each other.
Contradiction: Thanks to the fortunate change of plan, Miss Tuppence would have been very near to us.
Contradiction: I am frequently asked to change what I'm doing. 
Contradiction: And if official productivity statisticts understate the real rate of progress by 1 percent, official price statistics also understate inflation by exactly the same amount.
Contradiction: the child is at a park.