Text: As a sidetrip, take the D909 east to the Mont Veyrier cable car, continuing on to the pretty town of Menthon-Saint-Bernard and its medieval castle high above the lake.
Entailment: Go east by cable car as a sidetrip to the Mont Veyrier is you want to see a medieval castle.
Contradiction: Don't take a trip in the cable car, there's nothing to see along the way.