Question: what major cellular event happen during the s phase of interphase
[{'answer': 'DNA replication', 'provenance': [{'wikipedia_id': '1215494', 'title': 'S phase', 'start_paragraph_id': 6, 'start_character': 11, 'end_paragraph_id': 6, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Regulation.\n'}]}]