Complex sentence: The Victoria Memorial, officially the Victoria Memorial Hall, is a memorial building dedicated to Victoria, which is located in Kolkata (Calcutta), India--the capital of West Bengal and a former capital of British India.
Split into simpler sentences: The Victoria Memorial, officially called Victoria Memorial Hall, is a memorial building dedicated to Victoria, which is located in Kolkata (Calcutta), India. Kolkata is the capital of West Bengal and a former capital of British India.