Complex sentence: Zhao Gou, the Emperor Gazong of the Song Dynasty, had a pavilion built over the spring after once drank the water here, No.2 Spring Pavilion by name, and inscribed "Source of Running Water".
Split into simpler sentences: Zhao Gou, the Emperor Gazong of the Song Dynasty, had a pavilion built over the spring after once drank the water here. He named it as "No.2 Spring Pavilion", and inscribed "Source of Running Water".