Question: who formed the band of non violent revolutionary the khudai khidmatgars
[{'answer': 'Khan Abdul Ghaffar Khan', 'provenance': [{'wikipedia_id': '3978766', 'title': 'Khudai Khidmatgar', 'start_paragraph_id': 2, 'start_character': 260, 'end_paragraph_id': 2, 'end_character': 283, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3978766', 'title': 'Khudai Khidmatgar', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 328, 'bleu_score': 0.7432771499630131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15533934888625101188}, 'section': 'Section::::Abstract.'}]}]