I'm looking to research my family history using CompGen's resources. Can you tell me the primary method for searching their databases, approximately how many person records are available, and list at least three examples of historical sources their databases contain?
Navigate to 'https://genealogienetz.de/'. Click on the 'Recherchieren' (Research) link. Scroll down the page to find information about the databases and their contents. Identify the primary search method mentioned. Identify the approximate total number of person records available. List at least three examples of historical sources mentioned as being part of their databases. Synthesize all identified information into a concise answer.
The agent successfully navigates to `https://www.compgen.de/` (via redirection from `genealogienetz.de`). The agent identifies the primary search method as 'METASUCHE' (metasearch) across various databases, or by choosing a specific database. The agent states that the databases contain 'over 50 million' person records. The agent lists at least three of the following historical sources: 'Adressbücher' (address books), 'Familienanzeigen' (family announcements), 'Ortsverzeichnissen' (gazetteers), and 'Verlustlisten aus dem Ersten Weltkrieg' (casualty lists from WWI).