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.
The main ingredient in Smirnoff Ice is Smirnoffâs vodka. This vodka contains 69 calories and 11.3 grams of alcohol per 1 oz serving. Smirnoff vodka is created with the use of grains and is put through the a triple distillation process. In addition to being the main ingredient for the Ice drinks, Smirnoff vodka can be drunk alone, with fruit juice or in a number of different cocktail variations.