Question: who is the youngest player to play in the world cup
[{'answer': 'Northern Ireland', 'provenance': [{'wikipedia_id': '3602475', 'title': 'List of FIFA World Cup records and statistics', 'start_paragraph_id': 115, 'start_character': 49, 'end_paragraph_id': 115, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::Players.\n'}]}]