Definition: You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.
Input: Writing the book was easy, but the essay turned out to be a different matter, because the material in the _ was so complex to communicate.

essay