Question: when does the under 20s rugby world cup start
[{'answer': '30 May', 'provenance': [{'wikipedia_id': '55974751', 'title': '2018 World Rugby Under 20 Championship', 'start_paragraph_id': 1, 'start_character': 285, 'end_paragraph_id': 1, 'end_character': 291, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]