Task: Question Answering
Input (English): Passage: A while back I realized I needed some instructional material for a project I was working on , and searching for information on the internet was n't yielding the results I desired . I thought about other sources of information and realized that the library would probably have a book pertaining to what I needed . So I got in my car and set off for the library . Once I got there , I signed up for a library card since I knew I 'd need that to be able to borrow a book . I found the dewey decimal code for the book I wanted , and set off through the aisles . Finally , I found the aisle I was looking for . It only took me a moment from there to find the book I wanted . I told the librarian I 'd like to borrow the book . She wrote my information down and on the insert in the book , and gave me a due date . Then I was on my way . Question: What was used to search for the book? Option1: a librarian Option2: dewey decimal code
Output (English): dewey decimal code