Complex sentence: On the other hand, Dr. Singh in "Another Visitor", an ardent detractor of the western civilisation, who had never stepped out of India all his life, is in Paris for a few days as a part of his "world-travel".
Split into simpler sentences: On the other hand, Dr. Singh in "Another Visitor" is an ardent detractor of the western civilisation who has never stepped out of India all his life. He is in Paris for a few days as a part of his "world-travel".