1.   After Laver, topspin became an elemental part of the world-class game, practiced most notably by Bjorn Borg.

2.   Even so, no item, nor its elemental parts, could hide from these costume-makers.

3.   Moist towelettes are such an elemental part of American culture that they, like Beanie Babies and Spiro Agnew ashtrays, have become collectible.

4.   They have struggled with the most elemental part of the game, putting the ball into the back of the net.