Complex sentence: Since 1987, the buildings have been used as a "mångkulturellt centrum" (multicultural centre): a research centre focusing on the branch of anthropology dealing with the scientific description of individual cultures.
Split into simpler sentences: Since 1987, the buildings have been used by Mångkulturellt centrum ("Multicultural Centre"). This is a research center with an emphasis on the branch of anthropology dealing with the scientific description of individual cultures.