Question: when is the earliest hcg can be detected in urine
[{'answer': '10 days', 'provenance': [{'wikipedia_id': '311410', 'title': 'Pregnancy test', 'start_paragraph_id': 21, 'start_character': 451, 'end_paragraph_id': 21, 'end_character': 458, 'bleu_score': 1.0, 'section': 'Section::::Viability.\n'}]}]