Question: who has given the concept of positive liberty
[{'answer': 'Marxist humanistic philosopher Erich Fromm', 'provenance': [{'wikipedia_id': '338327', 'title': 'Positive liberty', 'start_paragraph_id': 3, 'start_character': 212, 'end_paragraph_id': 3, 'end_character': 254, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '338327', 'title': 'Positive liberty', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 399, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8811005038738248256}, 'section': 'Section::::Abstract.'}]}]