Anchor: In 1967 Penang was hit by serious riots, which highlighted the fact that political and social harmony could not be taken for granted.
Entailed: Towards the end of the 1960s, political tensions caused riots in Penang.
Contradiction: In 1967 Penang was hit by a nuclear bomb that devastated the city.
Contradiction: University has clear cut social structures. 
Contradiction: The competition among middle range hotels means bargaining for a lower rate is possible.
Contradiction: A man and woman are driving in a car.
Contradiction: The man is near train tracks.