Anchor: Snorkelling equipment is relatively cheap in the shops, but test the face mask carefully before you buy it.
Entailed: The face mask of a snorkel should be tested prior to purchasing.
Contradiction: Any snorkel equipment will cost a lot at the shops.
Contradiction: A snowboarder glides down a mountain path.
Contradiction: The automatic appeal could be handled quicker.
Contradiction: So says my kettle.
Contradiction: The animal is wet.