Complex sentence: During British Raj Samta was ruled by the Roys, who were the Zamindars of the village, subordinate to the Bardhaman Raj Estate, in turn subordinate to the British Empire.
Split into simpler sentences: During British Raj Samta was ruled by the Roys, who were the Zamindars of the village. The Zamindars were subordinate to the Bardhaman Raj Estate, who were in turn subordinate to the British Empire.