Text: For the vacationer, the best seaside resorts are along the indented shorelines of the west and south coasts, for which Ajaccio's airport and harbor (for the car ferry from Nice, Toulon, or Marseilles) provide a convenient gateway.
Entailment: Ajaccio's airport and harbor are a convenient gateway to the best seaside resorts along the west and south coasts.
Contradiction: Ajaccio's harbor is too inconvenient for vacationers from Toulon to reach any seaside resorts.