Students for a Democratic Society (SDS) was an understudy dissident development in the United States that was one of the fundamental portrayals of the New Left. The association created and extended quickly in the mid-1960s preceding dissolving at its last tradition in 1969.
We cant answer that because you never gave us the sentence (there is no sentence so i cant find the <span>pronoun used within the object of preposition) ?</span>