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: On the run , she develops a revolutionary new theory of quantum cognition , which she writes down in a little black book . 
 Question: who   writes  down something?
A: 
she