Complex sentence: After the death of Nara Narayan in 1584, Raghudev declared independence, and the kingdom ruled by the son of Nara Narayan, Lakshmi Narayan, came to be known as Cooch Behar.
Split into simpler sentences: After the death of Nara Narayan in 1584, Raghudev declared independence. The kingdom ruled by the son of Nara Narayan, Lakshmi Narayan, came to be known as Cooch Behar.