Question: When did the person who launched the Bardoli Satyagraha on 4th february 1928 die?

Knowledge 1: Bardoli Satyagraha
The Bardoli Satyagraha of 1928, in the state of Gujarat, India during the period of the British Raj, was a major episode of civil disobedience and revolt in the Indian Independence Movement. The movement was eventually led by Vallabhbhai Patel, and its success gave rise to Patel becoming one of the main leaders of the independence movement. [SEP] Knowledge 2: Vallabhbhai Patel
Vallabhbhai  Patel (31 October 1875 – 15 December 1950), popularly known as Sardar Patel, was an Indian politician. He served as the first Deputy Prime Minister of India. He was an Indian barrister and statesman, a senior leader of the Indian National Congress and a founding father of the Republic of India who played a leading role in the country's struggle for independence and guided its integration into a united, independent nation. In India and elsewhere, he was often called Sardar, meaning "chief" in Hindi, Urdu, and Persian. He acted as Home Minister during the political integration of India and the Indo-Pakistani War of 1947.Patel was raised in the countryside of state of Gujarat. He was a successful lawyer. He subsequently organised peasants from Kheda, Borsad, and Bardoli in Gujarat in non-violent civil disobedience against the British Raj, becoming one of the most influential leaders in Gujarat. He was appointed as the 49th President of Indian National Congress, organising the party for elections in 1934 and 1937 while promoting the Quit India Movement.
Knowledge 1: Bardoli Satyagraha
The Bardoli Satyagraha of 1928, in the state of Gujarat, India during the period of the British Raj, was a major episode of civil disobedience and revolt in the Indian Independence Movement. The movement was eventually led by Vallabhbhai Patel, and its success gave rise to Patel becoming one of the main leaders of the independence movement. [SEP] Knowledge 2: Narmada Bachao Andolan
Medha Patkar has been the guiding light of the movement. She has organized several fasts and satyagrahas. Patkar has also been to jail because of her desire to achieve right to life and livelihood for the suppressed people.
Knowledge 1: Vallabhbhai Patel
Vallabhbhai  Patel (31 October 1875 – 15 December 1950), popularly known as Sardar Patel, was an Indian politician. He served as the first Deputy Prime Minister of India. He was an Indian barrister and statesman, a senior leader of the Indian National Congress and a founding father of the Republic of India who played a leading role in the country's struggle for independence and guided its integration into a united, independent nation. In India and elsewhere, he was often called Sardar, meaning "chief" in Hindi, Urdu, and Persian. He acted as Home Minister during the political integration of India and the Indo-Pakistani War of 1947.Patel was raised in the countryside of state of Gujarat. He was a successful lawyer. He subsequently organised peasants from Kheda, Borsad, and Bardoli in Gujarat in non-violent civil disobedience against the British Raj, becoming one of the most influential leaders in Gujarat. He was appointed as the 49th President of Indian National Congress, organising the party for elections in 1934 and 1937 while promoting the Quit India Movement. [SEP] Knowledge 2: Narmada Bachao Andolan
Medha Patkar has been the guiding light of the movement. She has organized several fasts and satyagrahas. Patkar has also been to jail because of her desire to achieve right to life and livelihood for the suppressed people.

Answer: 15 December 1950