Question: when did guyana became a member of caricom
[{'answer': '1 August 1973', 'provenance': [{'wikipedia_id': '57357', 'title': 'Caribbean Community', 'start_paragraph_id': 58, 'start_character': 129, 'end_paragraph_id': 58, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]