The provided "Data Kalimat" exclusively details the life, family, and royal duties of Prince William, the Prince of Wales, and does not contain any information regarding "William Schallert cause of death." To produce an article that adheres to E-E-A-T principles (Expertise, Authoritativeness, Trustworthiness) and focuses on the requested topic of "William Schallert cause of death," specific and verifiable information related to William Schallert, including details about his life, career, and the circumstances surrounding his passing, would be essential. As the provided "Data Kalimat" does not support the topic of "William Schallert cause of death" and instead provides extensive information about Prince William, I am unable to generate the requested article while maintaining accuracy, trustworthiness, and adherence to the specified content requirements for the given keyword.
