Anchor: the garbage collection um more costly
Entailed: Garbage collection is more expensive.
Contradiction: Garbage collection that's cheaper. 
Contradiction: A pack of dogs in a car.
Contradiction: Major Management Challenges and Program A Governmentwide Perspective ( GAO/OCG-99-1,January 1999).
Contradiction: The society that established the National Gallery and the National Library was founded in 1633.
Contradiction: A grandpa is teaching his grandson how to fix things.