Question: who was an early advocate of the social gospel
[{'answer': 'Walter Rauschenbusch', 'provenance': [{'wikipedia_id': '638252', 'title': 'Social Gospel', 'start_paragraph_id': 1, 'start_character': 1051, 'end_paragraph_id': 1, 'end_character': 1071, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Washington Gladden', 'provenance': [{'wikipedia_id': '638252', 'title': 'Social Gospel', 'start_paragraph_id': 1, 'start_character': 1027, 'end_paragraph_id': 1, 'end_character': 1045, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Josiah Strong', 'provenance': [{'wikipedia_id': '638252', 'title': 'Social Gospel', 'start_paragraph_id': 1, 'start_character': 1012, 'end_paragraph_id': 1, 'end_character': 1025, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Richard T. Ely', 'provenance': [{'wikipedia_id': '638252', 'title': 'Social Gospel', 'start_paragraph_id': 1, 'start_character': 996, 'end_paragraph_id': 1, 'end_character': 1010, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '638252', 'title': 'Social Gospel', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1071, 'bleu_score': 0.857875831327056, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3438144531771885568}, 'section': 'Section::::Abstract.'}]}]