Sentence:  Because of the authentic homogeneity of his early Nationalistic materials , and his flair for orchestrations - his brilliant Petruchka , his savage Sacre du Printemps , his incisive Les Noces - the world kept hoping that he could recapture the historical direction for which his native talents <WSD>were</WSD> predisposed . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)