Question: write two basic feature of indus valley civilisation
[{'answer': 'urban planning', 'provenance': [{'wikipedia_id': '46853', 'title': 'Indus Valley Civilisation', 'start_paragraph_id': 2, 'start_character': 47, 'end_paragraph_id': 2, 'end_character': 61, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'baked brick houses', 'provenance': [{'wikipedia_id': '46853', 'title': 'Indus Valley Civilisation', 'start_paragraph_id': 2, 'start_character': 63, 'end_paragraph_id': 2, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]