Question: What is the date of birth of Kalpana Datta's husband?
Sentence (from "Kalpana Datta"): Kalpana Datta (27 July 1913 – 8 February 1995) (later Kalpana Joshi) was an Indian independence movement activist and a member of the armed independence movement led by Surya Sen, which carried out the Chittagong armoury raid in 1930.
Relevant evidence: No