Question: piaget's second of four stages of cognition is
[{'answer': 'the pre-operational stage', 'provenance': [{'wikipedia_id': '1058599', 'title': "Piaget's theory of cognitive development", 'start_paragraph_id': 17, 'start_character': 176, 'end_paragraph_id': 17, 'end_character': 201, 'bleu_score': 1.0, 'section': 'Section::::Nature of intelligence: operative and figurative.:Pre-operational stage.\n'}]}, {'provenance': [{'wikipedia_id': '1058599', 'title': "Piaget's theory of cognitive development", 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 983, 'bleu_score': 0.9044422358754051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11821619593595588892}, 'section': 'Section::::Nature of intelligence: operative and figurative.:Pre-operational stage.\n'}]}]