Question: when did canopy growth go public in canada
[{'answer': 'May 24 , 2018', 'provenance': [{'wikipedia_id': '44075900', 'title': 'Canopy Growth', 'start_paragraph_id': 5, 'start_character': 219, 'end_paragraph_id': 5, 'end_character': 232, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]