Complex sentence: In 1990 the glass was unearthed in Zhejiang province, Hangzhou Bansaan town (半山鎮), Shitang village (石塘村) in a Warring states period mausoleum.
Split into simpler sentences: In 1990 the glass was unearthed in Hangzhou, Zhejiang province. Specifically in Bansaan town (半山鎮), Shitang village (石塘村) in a Warring states period mausoleum.