Question: Who is Consort Yao's paternal grandfather?
Sentence (from "Consort Yao"): In 416, as Later Qin came under attack by the Jin general Liu Yu, Emperor Mingyuan considered dispatching troops to attack Liu Yu's flank, in order to save Later Qin (then ruled by Consort Yao's brother Yao Hong), an idea that many of his officials supported based on the marital relationships and their nagging suspicions that Liu Yu intended to attack Northern Wei as well, but after advice from the official Cui Hao, whose opinions he respected, he called off the campaign, and except for minor skirmishes near the Yellow River, Liu Yu's campaign against Later Qin went unimpeded by Northern Wei forces, and Later Qin fell in 417.
Relevant evidence: No