Complex sentence: Sir Anthony Oliphant's tea estate, the Oliphant Estate, situated in the hill country in Nuwara Eliya, was the first estate to grow tea in Ceylon, when thirty plants were smuggled from China.
Split into simpler sentences: Sir Anthony Oliphant also owned a tea estate, situated in the hill country in Nuwara Eliya. It was known as the Oliphant Estate, it was the first estate to grow 30 tea plants brought over from China.