Question: who said that religion is the opiate of the masses
[{'answer': 'Karl Marx .', 'provenance': [{'wikipedia_id': '300184', 'title': 'Opium of the people', 'start_paragraph_id': 1, 'start_character': 127, 'end_paragraph_id': 1, 'end_character': 140, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Karl Marx', 'provenance': [{'wikipedia_id': '300184', 'title': 'Opium of the people', 'start_paragraph_id': 1, 'start_character': 127, 'end_paragraph_id': 1, 'end_character': 136, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'German philosopher and economist Karl Marx'}, {'provenance': [{'wikipedia_id': '300184', 'title': 'Opium of the people', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 248, 'bleu_score': 0.7823539203162181, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2264917486688445038}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '300184', 'title': 'Opium of the people', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"Religion is the opium of the people" is one of the most frequently paraphrased statements of German philosopher and economist Karl Marx. It was translated from the German original, and is often rendered as "religion... is the opiate of the "masses"."', '"Religion is the opium of the people" is one of the most frequently paraphrased statements of German philosopher and economist Karl Marx. It was translated from the German original, and is often rendered as "religion... is the opiate of the "masses"."', 'Religion is the opium of the people" is one of the most frequently paraphrased statements of German philosopher and economist Karl Marx']}}]}]