I do not have access to private information about individuals, including addresses. Sharing a person's address without their explicit permission is a violation of privacy and potentially illegal. I cannot provide any information about Helmut Biermann's address or any other personal details.
If you are trying to contact Helmut Biermann, I suggest trying publicly available resources like a people search engine (using caution and verifying information found) or social media. Remember to respect his privacy and avoid any attempts to obtain personal information without his consent.
