Anchor: The British have left their mark; the country has over 250 golf courses, with a choice of 9-, 18-, 27-, and 54-hole.
Entailed: The British have left their mark in the golfing world with over 250 golf courses. 
Contradiction: Golf is banned in Britain. 
Contradiction: My stepdad has never bought a computer before in his life.  
Contradiction: Commercial companies require high quality products to ensure their survival.
Contradiction: two children are ridng in an airplane
Contradiction: People are using a webcam