Anchor: From pedal boats and canoes to windsurfing and jetskiing, the choice is yours.
Entailed: Windsurfing is an activity in which one can participate.
Contradiction: There is only one type of boat available.
Contradiction: A group of ladies enjoy playing nintendo.
Contradiction: They are helping others
Contradiction: Urban growth has crowded the monastery and destroyed the view of the countryside it once had. 
Contradiction: Some economists are concerned about the concentration in the economy.