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.
How many calories in a Vodka Shot? A typical shot of vodka is 1.5 fluid oz. According to the United States Department of Agriculture, calories in vodka is determined by the proof/percent alcohol of the alcohol. So we can break it down like this: