Anchor: My blood is needed for--"  "For spells that won't work anyhow," he told her harshly.
Entailed: My blood is required for-- For spells that aren't going to work anyways.
Contradiction: The spells will work with my blood.
Contradiction: The building does not house anyone at all. 
Contradiction: A skater does a trick.
Contradiction: He is destroying a house slowly over a three year period and the city is happy about it.
Contradiction: Continue along Yefet Street and you will be able to reach Pasteur Street.