Question: what phase of transcription occurs when double stranded dna is separated
[{'answer': 'elongation', 'provenance': [{'wikipedia_id': '9955145', 'title': 'Eukaryotic transcription', 'start_paragraph_id': 2, 'start_character': 74, 'end_paragraph_id': 2, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9955145', 'title': 'Eukaryotic transcription', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 642, 'bleu_score': 0.9802931511945101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12926739603091541455}, 'section': 'Section::::Elongation.\n'}]}]