Contemporary scholars have studied the idea of coherence in the Quran more vigorously and are of widely divergent opinions. For example, Hamid Farrahi (d. 1930) and Richard Bell (d. 1952) have different opinions regarding coherence within chapters. Farrahi believed that the whole structure of the Quran is thematically coherent, which is to say, all verses of a chapter of the Quran are integrally related to each other to give rise to the major theme of the chapter and again all of the chapters are interconnected with each other to constitute the major theme of the Quran. According to Farrahi, each chapter has a central theme ("umud" or pillar) around which the verses revolve: