Complex sentence: Nepal sent her tenth quinquennial mission to China in 1837 under the leadership of Chautariya (a collateral member of the royal family) Pushkari Shah, an important member of a collateral branch of the royal family.
Split into simpler sentences: Nepal sent her tenth quinquennial mission to China in 1837 under the leadership of Chautariya (a collateral member of the royal family) Pushkari Shah. He was an important member of a collateral branch of the royal family.