Original sentence: The Institute also organises, together with Stofnun Árna Magnússonar, an annual summer school in manuscript studies, held alternately in Copenhagen and Reykjavík, and, together with the Danish Royal Library, an international conference on the care and conservation of manuscripts, held in Copenhagen every 18 months
Edited sentence: 6th International Summer School in Manuscript Studies.The 12th International Seminar on the Care and Conservation of Manuscripts.The Institute also organises, together with Stofnun Árna Magnússonar, an annual summer school in manuscript studies, held alternately in Copenhagen and Reykjavík, and, together with the Danish Royal Library, an international seminar on the care and conservation of manuscripts, held in Copenhagen every 18 months