Original: The PAD called for the resignation of the governments of Thaksin Shinawatra, Samak Sundaravej and Somchai Wongsawat, whom the PAD accused of being proxies for Thaksin.
Simplified: Their purpose is asking for the resignation of the government of the three Prime ministers - Thaksin Shinawatra, Samak Sundaravej and Somchai Wongsawat.