Given the task definition and input, reply with output. In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.

Context: Milkwhite Sheets is the fourth solo album released by former Belle & Sebastian member Isobel Campbell. The album was released on October 23 2006. It brings traditional songs from United Kingdom and songs written by Campbell. She said the album was inspired by the works of Jean Ritchie Anne Briggs and Shirley Collins.
Question: The document can be classified to which topic?
Options: 1)OfficeHolder, 2)WrittenWork, 3)EducationalInstitution, 4)Album, 5)Athlete
4