Question: who claimed that reality is the eternal realm of the forms
[{'answer': 'Plato', 'provenance': [{'wikipedia_id': '25754129', 'title': 'Theory of forms', 'start_paragraph_id': 1, 'start_character': 104, 'end_paragraph_id': 1, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]