Question: what is the written dialogue portion of a musical called
[{'answer': 'libretto'}, {'answer': 'script', 'provenance': [{'wikipedia_id': '26436', 'title': 'Rent (musical)', 'start_paragraph_id': 7, 'start_character': 406, 'end_paragraph_id': 7, 'end_character': 412, 'bleu_score': 1.0, 'section': 'Section::::Concept and genesis.\n'}]}, {'provenance': [{'wikipedia_id': '26436', 'title': 'Rent (musical)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7437282812129358854}, 'section': 'Section::::Abstract.'}]}, {}, {'provenance': [{'wikipedia_id': '26436', 'title': 'Rent (musical)', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 691, 'bleu_score': 0.9513840121740441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7437282812129358854}, 'section': 'Section::::Concept and genesis.\n'}]}, {'provenance': [{'wikipedia_id': '26744396', 'title': 'Play (theatre)', 'section': 'Section::::Terminology.\n', 'start_paragraph_id': 32, 'end_paragraph_id': 32, 'meta': {'evidence_span': ['For a musical play (opera, light opera, or musical) the term "libretto" is commonly used, instead of "script". A play is usually divided into acts, similar to what chapters are in a novel. A short play may consist of only a single', 'The term "script" refers to the written text of the play. After the front matter, such as title and author, it conventionally begins with a "dramatis personae": a list presenting each of the main characters of the play by name, followed by a brief characterization (e.g., ", a drunken Butler".) For a musical play (opera, light opera, or musical) the term "libretto" is commonly used, instead of "script".', 'The term "script" refers to the written text of the play. After the front matter, such as title and author, it conventionally begins with a "dramatis personae": a list presenting each of the main characters of the play by name, followed by a brief characterization (e.g., ", a drunken Butler".) For a musical play (opera, light opera, or musical) the term "libretto" is commonly used, instead of "script".']}}]}]