Anchor: Although the warm, clear waters of the Aegean constitute a near-perfect diving environment, until recently the Greek government was rightly concerned about the possible damage divers might do to submerged ancient sites, and diving was prohibited.
Entailed: The Greek government was worried about divers damaging the underwater ancient sites.
Contradiction: The Greek government isn't worried about underwater sites at all, not caring if they are damaged.
Contradiction: Tuppence thinks that someone was a shocking liar.
Contradiction: The elderly lady with gaps in her teeth holds a peice of metal.
Contradiction: The person is in the city.
Contradiction: A man rides his dirt bike