Anchor: A baseball player wearing a blue shirt is running toward a base.
Entailed: The baseball player is running towards the base.
Contradiction: The baseball player is wearing a green shirt.
Contradiction: A man is singing into a seashell whilst playing the keyboard
Contradiction: The contrary position can be argued. 
Contradiction: The group of people are doing handstands.
Contradiction: A man on a balcony is speaking to a woman on the street.