In linking a subordinate clause and a main clause, a relative pronoun functions similarly to a subordinating conjunction. Unlike a conjunction, however, a relative pronoun does not simply mark the subordinate (relative) clause, but also plays the role of a noun within that clause.
The main ingredient in most vodkas is some kind of grain, such as wheat, corn or rye. Potatoes are another common base ingredient for vodka, according to About.com.
Vodka is Made from Potatoes. While vodka can be distilled from potatoesâas with the Swedish Karlssonâs Gold Vodka âit can also be produced from pretty much anything. (The French Ciroc is grape-based, and thereâs even a brand made from milk .) But most vodka in this country is made from corn, wheat or other grains.