Each set of wisdom teeth could only be extracted once.

Now, with scholarships in abundance and greater opportunity for recognition, the peer pressure is almost as great as the demands once extracted by coaches.

Lac was once extracted from scale insects but is now replaced by synthetic substitutes.

And once extracted, the gas would travel about 340 miles by undersea pipeline to Russia's northern coast.

Once extracted from the tusk, the handle was polished on both sides and hollowed out to receive the blade.

Coal was once extracted by deep mines but is only mined today through surface mining.

Once extracted, the gold itself took many paths.

Once extracted, the uranium was used for electricity production in France and much of Europe.

The town was once an important trading center for salt extracted from nearby saline wells.

The Court did not decide whether such pledges, once extracted, are legally enforceable.