Question: Who is the paternal grandfather of Princess Yasmin Aga Khan?

Context paragraphs:
title: Rahim Aga Khan
paragraph_text: Prince Rahim Aga Khan( رحیم آغا خان; born 12 October 1971) is the eldest son of Prince Karim Aga Khan and his first wife Princess Salimah Aga Khan. He graduated from Phillips Academy in Andover, Massachusetts, in 1990 and from Brown University in the United States in 1995 and is involved in the Aga Khan Development Network's economic development institutions, as part of the Aga Khan Fund for Economic Development. On 26 April 2013 Aga Khan IV announced the engagement of Prince Rahim Aga Khan, to Kendra Spears/ Princess Salwa Aga Khan. The couple married on 31 August 2013 in a private ceremony held at Bellerive Castle on the shores of Lake Geneva, Switzerland. The bride took the name Princess Salwa. He and Princess Salwa announced the birth of their first child, a boy named Prince Irfan, in April 2015. Their second son Prince Sinan was born on 2 January 2017 in London, United Kingdom.
title: Zahra Aga Khan
paragraph_text: Princess Zahra Aga Khan( born 18 September 1970 in Geneva, Switzerland) is the eldest child of Aga Khan IV.
title: Inaara Aga Khan
paragraph_text: Princess Gabriele of Leiningen, formerly Begum Inaara Aga Khan( born 1 April 1963 in Frankfurt am Main), also previously known as Princess Inaara Aga Khan, and was the second wife of the Aga Khan IV, the 49th Imam of the Nizari branch of the Shia Imami Ismaili Muslims; from May 1998 to March 2014, she held the title" Begum Aga Khan".
title: Hussain Aga Khan
paragraph_text: Prince Hussain Aga Khan( born April 10, 1974, in Geneva, Switzerland) is the third child and second son of Aga Khan IV and his first wife, Princess Salimah Aga Khan.
title: John Yarde-Buller, 3rd Baron Churston
paragraph_text: John Reginald Lopes Yarde- Buller, 3rd Baron Churston, MVO, OBE( 9 November 1873 – 19 April 1930) was a British peer and soldier. He is the grandfather of Karim Aga Khan, leader of the Nizari Ismailis, an Islamic sect.
title: Aga Khan IV
paragraph_text: Karim al-Husayn Shāh, also known as "the Prince Shah Karim Al Hussaini" outside Ismaili Muslim communities, and by the religious-political title Aga Khan IV to Ismaili communities, ("Aga Khan" is also transliterated as "Aqa Khan" and "Agha Khan"; born 13 December 1936) is the 49th and current Imam of Nizari Ismailism, a denomination of Isma'ilism within Shia Islam with an estimated 10–15 million adherents (10–12% of the world's Shia Muslim population). The Aga Khan is a business magnate with British and Portuguese citizenship, as well as a racehorse owner and breeder. He has held this position of Imam, under the title of Aga Khan IV, since 11 July 1957, when, at the age of 20, he succeeded his grandfather, Sir Sultan Muhammad Shah Aga Khan III. It is believed that the Aga Khan is a direct lineal descendant of the Islamic prophet Muhammad through Muhammad's cousin and son-in-law, Ali, considered the first Imam in Shia Islam, and Ali's wife Fatima az-Zahra, Muhammad's daughter from his first marriage. "Forbes" describes the Aga Khan as one of the world's ten richest royals with an estimated net worth of US$3 billion. Additionally he is unique among the richest royals as he does not rule over a geographic territory. Among the goals the Aga Khan has said he works toward are the elimination of global poverty; the promotion and implementation of religious pluralism; the advancement of the status of women; and the honoring of Islamic art and architecture. He is the founder and chairman of the Aga Khan Development Network, one of the largest private development networks in the world. The organisation works toward improvement of the environment, health, education, architecture, culture, microfinance, rural development, disaster reduction, the promotion of private-sector enterprise and the revitalisation of historic cities. Since his ascension to the Imamate of Nizari Ismailis in 1957, the Aga Khan has been involved in complex political and economic changes which have affected his Nizari Ismaili followers, including the independence of African countries from colonial rule, expulsion of Asians from Uganda, the independence of Central Asian countries such as Tajikistan from the former Soviet Union and the continuous turmoil in Afghanistan and Pakistan. Aga Khan IV became the first faith leader to address the Joint Session of the Parliament of Canada on 27 February 2014.
title: Salimah Aga Khan
paragraph_text: Princess Salimah Aga Khan ("née" Sarah Frances Croker-Poole; born 28 January 1940), also known as Begum Salimah Aga Khan, is a former fashion model and an ex-wife of the 49th Ismaili Shia Imam, the IV Aga Khan Prince Karim Aga Khan.
title: Princess Yasmin Aga Khan
paragraph_text: Princess Yasmin Aga Khan (born December 28, 1949) is a Swiss-born American philanthropist known for raising public awareness of Alzheimer's disease. She is the second child of American movie actress and dancer Rita Hayworth, and the third child of Prince Aly Khan, Pakistan's representative to the United Nations from February 1958 until his death in 1960.
title: Prince Aly Khan
paragraph_text: Prince Ali Salman Aga Khan( 13 June 1911 – 12 May 1960), known as Aly Khan, was a son of Sultan Mahommed Shah, Aga Khan III, the leader of the Nizārī Ismaili Muslims, a sect of Shia Islam, and the father of Aga Khan IV. A socialite, racehorse owner and jockey, he was the third husband of actress Rita Hayworth. After being passed over for succession as Aga Khan, he served as the Permanent Representative of Pakistan to the United Nations from 1958 to 1960, where he became a vice president of the General Assembly. His first name was typically spelled" Aly" in the press. The titles of prince and princess, which are claimed by children of the Aga Khan by virtue of their descent from the Qajar king Fath Ali Shah of the Iranian( Persian) Qajar dynasty, were recognized as courtesy titles by the British government in 1938.
title: Princess Salwa Aga Khan
paragraph_text: Princess Salwa Aga Khan( born Kendra Spears August 5, 1988) is an American fashion model and the wife of Prince Rahim Aga Khan.

Reasoning steps:
Yasmin Aga Khan father Prince Aly Khan
Prince Aly Khan father Aga Khan III

Answer: spans: Aga Khan III