In this task, you are given a sentence and question which can be answered using the sentence. Your task is to answer the question using the information from the sentence. The answer to the question is unique and it is a continuous text span from the sentence.
Q: Sentence: Many composers have been capable of producing music in printed form without the capacity themselves to read or write in musical notation , as long as an amanuensis of some sort is available . 
 Question: what might someone write?
A: 
musical notation