Exporting a database from an old system and importing it into a new one is possible. However, exporting only specific elements, such as Questions, Answers, and Comments, may be difficult, as these are associated with particular users and referencing other tables. This process could require a significant amount of manual work on the database. While it is not a straightforward task, it is not impossible, especially if you have experience working with databases and queries. I have completed similar projects before and can offer assistance if needed.