Anchor: Whoever first stepped ashore on Madeira discovered no signs of previous habitation no Stone-Age natives, as the Spanish found on the Canary Islands, and no mysterious monuments to the past, as on the Balearics.
Entailed: The Spanish were the ones to discover the Canary Islands.
Contradiction: The British discovered the Canary Islands first.
Contradiction: A goldfish is swimming in its bowl.
Contradiction: the floow is being swept
Contradiction: I couldn't speak to how things are done in north Texas. 
Contradiction: A group of children engaging in a competition.