Question: the cultural core of early olmec civilization was located at
[{'answer': 'San Lorenzo Tenochtitlán', 'provenance': [{'wikipedia_id': '77260', 'title': 'Olmecs', 'start_paragraph_id': 2, 'start_character': 259, 'end_paragraph_id': 2, 'end_character': 283, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '77260', 'title': 'Olmecs', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 956, 'bleu_score': 0.927353011317471, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 86850882591768103}, 'section': 'Section::::Abstract.'}]}]