Question: where does pre mrna splicing occur in eukaryotes
[{'answer': 'spliceosome', 'provenance': [{'wikipedia_id': '28524', 'title': 'RNA splicing', 'start_paragraph_id': 1, 'start_character': 660, 'end_paragraph_id': 1, 'end_character': 671, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28524', 'title': 'RNA splicing', 'start_paragraph_id': 1, 'start_character': 81, 'end_paragraph_id': 1, 'end_character': 849, 'bleu_score': 0.7701726794953431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9350667957608656007}, 'section': 'Section::::Abstract.'}]}]