1. ogg

    https://pid.univie.ac.at/vocabulary/TR4G-6P0B

  2. open access

    https://pid.univie.ac.at/vocabulary/QW5R-NG4J

  3. opera

    https://pid.univie.ac.at/vocabulary/8QDK-T11S

  4. original

    https://pid.univie.ac.at/vocabulary/AYRE-RQAS

  5. other

    https://pid.univie.ac.at/vocabulary/PYRE-RAWJ