Question: Who is Li Sujie's paternal grandmother?
Sentence (from "Li Sujie"): In 690, with Empress Wu serving as empress dowager and regent over her son Emperor Ruizong, she began to massacre Tang imperial clan members in preparation of seizing the throne herself, and she summoned Li Sujie and his older brother Li Shangjin (李上金) to the then-capital Luoyang.
Relevant evidence: No