Question: What is the date of death of Empress Dowager Gong's husband?
Sentence (from "Grand Empress Dowager Shangguan"): Grand Empress Dowager Shangguan( 上官太皇太后)( personal name unknown)( 89 BC – 37 BC), also known as Empress Shangguan( 上官皇后), Empress Xiaozhao( 孝昭皇后) and Empress Dowager Shangguan( 上官太后), was an Empress, Empress Dowager and Grand Empress Dowager during the Han Dynasty and wife of Emperor Zhao.
Relevant evidence: No