Anchor: But for the ad agencies, indispensability turned out to be a hard sell.
Entailed: Ad agencies had a hard time convincing of indispensability.
Contradiction: Indispensability was a simple thing for ad agencies to convince others of.
Contradiction: Unfortunately the acoustics in the opera were rated a failure.
Contradiction: The students are studying.
Contradiction: Two elderly men enjoying sandwiches on a bench.
Contradiction: Whittington thought about his proposal and turned to Tuppence.