Question: where does the tip of a picc line end
[{'answer': 'the superior vena cava', 'provenance': [{'wikipedia_id': '1551811', 'title': 'Peripherally inserted central catheter', 'start_paragraph_id': 1, 'start_character': 531, 'end_paragraph_id': 1, 'end_character': 553, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1551811', 'title': 'Peripherally inserted central catheter', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 642, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6493999287265126391}, 'section': 'Section::::Abstract.'}]}]