Question: when did the european convention on human rights come into force
[{'answer': '3 September 1953', 'provenance': [{'wikipedia_id': '9830', 'title': 'European Convention on Human Rights', 'start_paragraph_id': 1, 'start_character': 319, 'end_paragraph_id': 1, 'end_character': 335, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9830', 'title': 'European Convention on Human Rights', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 482, 'bleu_score': 0.9075342801721581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9201366649400088593}, 'section': 'Section::::Abstract.'}]}]