What is the fine-grained topic of the following text: This show is co-organized by Messe Dusseldorf, one of the leading exhibition centers in the industry, and is supported by two main brands of Dusseldorf: drupa supports the full range of printing and interpack supports the full range of packaging and processing in this exhibition. Only return the topic.
Organization of an industry exhibition by Messe Dusseldorf, drupa, and interpack