Question: what term describes bacteria that stains pink with gram stain
[{'answer': 'Gram - negative', 'provenance': [{'wikipedia_id': '12935', 'title': 'Gram stain', 'start_paragraph_id': 34, 'start_character': 230, 'end_paragraph_id': 34, 'end_character': 244, 'bleu_score': 1.0, 'section': 'Section::::Orthographic note.\n'}]}]