Anchor: Rockefeller wanted a great college, and he went to great trouble to lure Harper from Yale to the nascent University of Chicago.
Entailed: Rockefeller went through a lot of trouble because he wanted a great school.
Contradiction: Rockefeller didn't really care about colleges at all, so he didn't mind Harper going to Yale.
Contradiction: Everyone looks at the sky.
Contradiction: I have witnessed plenty of people doing that.
Contradiction: The boy is pounding a wrench on the table.
Contradiction: The football match drew a crowd.