In early 12th-century al-Andalus, the Arabian philosopher, Ibn Tufail (Abubacer), wrote discussions on materialism in his philosophical novel, Hayy ibn Yaqdhan (Philosophus Autodidactus), while vaguely foreshadowing the idea of a historical materialism.
In what book did Hayy ibn Yaqdhan foreshadow the idea of modern materialism? 
{'text': 'Philosophus Autodidactus', 'answer_start': 161}