Complex sentence: He spent his formative years in both Calcutta and Lucknow, being influenced by the famous journalist, Harish Chandra Mukherjee, who was a neighbour of his family in Bhowanipore.
Split into simpler sentences: He spent his formative years in both Calcutta and Lucknow. While in Calcutta, he was influenced by the famous journalist, Harish Chandra Mukherjee, who was a neighbour of his family when they lived in Bhowanipore.