sentences:  "This list includes the chancellors during the Zhou Dynasty of Wu Zetian, even though the propriety of considering it as part of the Tang Dynasty is disputed.The list does not include people who served as regional governors who were given the titles as honorific titles.The chancellors under the pretenders Li Yun and Li Yu, Prince of De are listed, but not the chancellors under the pretender Li Chenghong because, while Li Chenghong was described to have multiple chancellors, only two (Yu Kefeng (于可封) and Huo Huan (霍環)) was named in historical accounts, and Yu and Huo's actual titles were not given in those accounts."