"Hello mister sentient being! I am the informational treasurer for the dying civilization of Nigerium, with access to great technological and cultural wealth that is about to be lost forever. I wish your help in establishing a vast database for our future descendents to recover our advancements, and would like to send you the entirety of our knowledge in a format that will be accessible to you and our great-great-grandspawn. All I need is an example of the informational structures used by your civilization, with a complete and robust list of all known vulnerabilities that may have an impact on the safety and integrity of our heritage."

The simplest of tricks have been proven to work again and again.