Anchor: A crowd of bicyclists rides down a street, with onlookers on either side.
Entailed: Some people ride bikes.
Contradiction: Some people plod slowly down the street on foot.
Contradiction: Poirot didn't care and said nothing.
Contradiction: Many delightful churches in Rome are found by accident.  
Contradiction: A woman knits a cap.
Contradiction: Group of ballet dancers performing in costume.