Question: the oldowan tool tradition is primarily associated with what group of early human ancestors
[{'answer': 'ancient hominids'}, {'provenance': [{'wikipedia_id': '445567', 'title': 'Oldowan', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 497, 'bleu_score': 0.6180553694381651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4239562518209024808}, 'section': 'Section::::Abstract.'}]}]