Q: In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to write a single word that describes the genre that the two sentences belong to, such as face-to-face, government, letters, 9/11, slate, telephone, travel, verbatim, oup, fiction.
Sentence 1: Observers searched in vain for an economically rational explanation for Barro's change of heart. Sentence 2: Observers looked for money of or Barro's company.
A:
slate