Given the question: Read the bio below and try to give details on bertil hallin 's:      - birth date     - name     - background     - occupation     Bio: bertil hallin , born 30 december 1931 , is a swedish church musician and music teacher , active in malmö . he participated as an expert in the hymn commission of 1969 , which led to the creation of the 1986 swedish hymnal .
The answer is:
- birth date is 30 december 1931- name is bertil hallin- background is non_performing_personnel- occupation is church musician , music teacher