Question: which nrl teams have never won a premiership
[{'answer': 'Gold Coast Titans', 'provenance': [{'wikipedia_id': '255709', 'title': 'National Rugby League', 'start_paragraph_id': 22, 'start_character': 116, 'end_paragraph_id': 22, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::History.:2003–2010: Record popularity, expansion and centenary.\n'}]}, {'answer': 'New Zealand Warriors', 'provenance': [{'wikipedia_id': '255709', 'title': 'National Rugby League', 'start_paragraph_id': 15, 'start_character': 145, 'end_paragraph_id': 15, 'end_character': 165, 'bleu_score': 1.0, 'section': 'Section::::History.:1998–2002: Rationalisation.\n'}]}]