Anchor: A busker performs on guitar among a crowded street.
Entailed: A busker is playing outdoors.
Contradiction: A guitarist performs inside a bar.
Contradiction: A man is learning how to cook.
Contradiction: GAO communicates with agencies in a predetermined format that doesn't allow the files to be changed
Contradiction: CO2 has been regulated as a pollutant under the Clean Air Act.
Contradiction: Several adult male veterans with a hypertension diagnosis had been examined recently.