Question: what is the location of smooth endoplasmic reticulum
[{'answer': 'found in eukaryotic cells', 'provenance': [{'wikipedia_id': '9775', 'title': 'Endoplasmic reticulum', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]