Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: Which book covered a longer historical time span in years, Empire or Hollywood? Passage:After publishing the plays Weekend (1968) and An Evening With Richard Nixon (1972) and the novel Two Sisters: A Novel in the Form of a Memoir (1970), Vidal concentrated upon the essay and developed two types of fiction. The first type is about American history, novels specifically about the nature of national politics. About those historical novels, the critic Harold Bloom said that "Vidal's imagination of American politics ... is so powerful as to compel awe". The historical novels formed the seven-book series, Narratives of Empire: (i) Burr (1973), (ii) 1876 (1976), (iii) Lincoln (1984), (iv) Empire (1987), (v) Hollywood (1990), (vi) Washington, D.C. (1967) and (vii) The Golden Age (2000). Besides U.S. history, Vidal also explored and analyzed the history of the ancient world, specifically the Axial Age (800–200 B.C.), with the novel Creation (1981). The novel was published without four chapters that were part of the manuscript he submitted to the publisher; years later, Vidal restored the chapters to the text and re-published the novel Creation in 2002.


a