The Hindu–German Conspiracy was a series of plans between 1914 and 1917 by Indian nationalist groups to attempt Pan-Indian rebellion against the British Raj during World War I, formulated between the Indian revolutionary underground and exiled or self-exiled nationalists who formed, in the United States, the Ghadar Party, and in Germany, the Indian independence committee, in the decade preceding the Great War.
 The conspiracy was drawn up at the beginning of the war, with extensive support from the German Foreign Office, the German consulate in San Francisco, as well as some support from Ottoman Turkey and the Irish republican movement.
 The most prominent plan attempted to foment unrest and trigger a Pan-Indian mutiny in the British Indian Army from Punjab to Singapore.
 This plot was planned to be executed in February 1915 with the aim of overthrowing British rule over the Indian subcontinent.
 The February mutiny was ultimately thwarted when British intelligence infiltrated the Ghadarite movement and arrested key figures.
 Mutinies in smaller units and garrisons within India were also crushed.
Shyam Sundar Chakravarthy (12 July 1869 – 7 September 1932), alternately spelled as Shyam Sundar Chakravarty or Shyam Sundar Chakravarthi (Bengali: শ্যাম সুন্দর চক্রবর্তী ), was an Indian revolutionary, independence activist and journalist from Bengal.
 He was born in Bharenga, Pabna in Bengal Presidency (currently in Bangladesh).
 He belonged to the "Pabna Group" of Bengali revolutionaries along with Abinash Chakravarty and Annada Kaviraj.
 In 1905 he was the sub-editor of the revolutionary journal "Sandhya".
 In 1906, He joined with Bengali nationalist newspaper "Bande Mataram" as an assistant to its editor Sri Aurobindo and later became its editor.
 In 1908, he was deported to Burma.
 Later he became an adherent of the non violent methods of Indian National Congress and an office bearer of the Swaraj Party.
 He founded and edited the newspaper ""The Servant"" in 1920 to promote the Non-cooperation movement.
Sukhdev Thapar (15 May 1907 – 23 March 1931) was an Indian revolutionary.
 He was a senior member of Hindustan Socialist Republican Association.
 He was hanged on 23 March 1931 at the age of 23.
Manmath Nath Gupta (7 February 1908 – 26 October 2000) was an Indian revolutionary writer and author of autobiographical, historical and fictional books in Hindi, English and Bengali.
 He joined the Indian independence movement at the age of 13, and was an active member of the Hindustan Republican Association.
 He participated in the famous Kakori train robbery in 1925 and was imprisoned for 14 years.
 On release from jail in 1937, he started writing against the British government.
 He was sentenced again in 1939 and was released in 1946 just a year before the India's independence in 1947.
 He has written several books on the history of the Indian struggle for independence from a revolutionary's point of view, including "They Lived Dangerously – Reminiscences of a Revolutionary".
 He was also the editor of the Hindi literary magazine "Aajkal".
Sachindra Nath Bakshi (25 December 1904 – 23 November 1984) was a prominent Indian revolutionary belonging to the Hindustan Republican Association (HRA, which after 1928 became the Hindustan Socialist Republican Association or HSRA) that was created to carry out revolutionary activities against the British Empire in India.
Gauhar Raza (born 17 August 1956) is an Indian scientist by profession, and a leading Urdu poet, social activist and documentary filmmaker working to popularize the understanding of science among general public, known for his films like "Jung-e-Azadi", on the India's First War of Independence, and "Inqilab" (2008) on Bhagat Singh.
 He was also the honorary director of Jahangirabad Media Institute.
Durgavati Devi (Durga Bhabhi) (7 October 1907 – 15 October 1999) was an Indian revolutionary and a freedom fighter.
 She was one of the few women revolutionaries who actively participated in armed revolution against the ruling British Raj.
 She is best known for having accompanied Bhagat Singh on the train journey in which he made his escape in disguise after the Saunders killing, Since she was the wife of Hindustan Socialist Republican Association (HSRA) member Bhagwati Charan Vohra, other members of HSRA referred to her as "Bhabhi" (elder brother's wife) and became popular as "Durga Bhabhi" in Indian revolutionary circles.
 Durgavati Devi was a Bengali woman and her mother tongue was Bengali.
Bhagat Singh (] 1907  – 23 March 1931) was a charismatic Indian socialist revolutionary whose two acts of dramatic violence against the British in India and execution at age 23 made him a folk hero of the Indian independence movement.
Vishnu Ganesh Pingle was an Indian revolutionary and a member of the Ghadar Party who was one of those executed in 1915 following the Lahore conspiracy trial for his role in the Ghadar conspiracy.
Ved Rahi (born 1933) is an Indian film director who made the film "Veer Savarkar" (2001), a bio-epic on the life of Indian revolutionary Vinayak Damodar Savarkar.
 He also directed Doordarshan show "Gul Gulshan Gulfaam".
 His novel, "Lal Ded", is based on the life of the Kashmiri saint poet of the same name, was in the Dogri language.

Question: Which filmmaker made a film on an Indian revolutionary who was executed at 23?
Answer: Gauhar Raza