question: Who is the paternal grandfather of Hamad Bin Isa Al Khalifa?
context: [["Saud bin Abdelaziz bin Hamad Al Thani", ["Shaikh Saud bin Abdelaziz bin Hamad bin Abdullah bin Jassim bin Muhammed Al Thani( 1949 in Qatar)", "He is the cousin of Qatari ruler Hamad bin Khalifa Al Thani, grandson of Hamad bin Abdullah Al Thani and great- grandson of Abdullah bin Jassim Al Thani.", "Estimates of his net worth range from 3- 12 billion USD."]], ["Abdullah bin Hamad bin Isa Al Khalifa", ["Abdullah bin Hamad bin Isa Al Khalifa( born 30 June 1976) is the second son of the present King of Bahrain, Hamad ibn Isa Al Khalifah and his first wife, Sabika bint Ibrahim Al Khalifa.", "Like all members of the royal family, Abdullah sits as a senior member of the civil judiciary.", "In addition to his government positions, Abdullah is chairman of the Bahrain Motor Federation and the Commission Internationale de Karting."]], ["Sabika bint Ibrahim Al Khalifa", ["Sabika bint Ibrahim Al Khalifa( born in Muharraq in 1948) is the Princess consort of Bahrain as the first wife of the present King of Bahrain, Hamad bin Isa Al Khalifa, and the mother of the Crown Prince, Salman bin Hamad bin Isa Al Khalifa."]], ["Hamad bin Isa Al Khalifa", ["Hamad bin Isa bin Salman Al Khalifa (born 28 January 1950) is the King of Bahrain.", "He has been the monarch of Bahrain since 6 March 1999, initially reigning as emir, and from 14 February 2002, as the first king.", "He is the son of Isa bin Salman Al Khalifa, the previous and first emir.", "The country has been ruled by the Al Khalifa dynasty since 1783."]], ["Khalifa bin Salman Al Khalifa", ["Prince Khalifa bin Salman Al Khalifa( born 24 November 1935) is the Prime Minister of Bahrain since 1969, taking office nearly two years before Bahrain's independence on 15 August 1971.", "He is the longest- serving current prime minister in the world.", "He still retains his post, although under the 2002 Constitution he has lost some of his powers, with the King having the authority to appoint and( along with the Bahraini parliament) dismiss ministers.", "He is the paternal uncle of the reigning King Hamad bin Isa Al Khalifa and granduncle of the Crown Prince Salman, since he is the younger brother of the former Emir Isa bin Salman Al Khalifa."]], ["Salman Ebrahim Mohamed Ali Al Khalifa", ["Salman Ebrahim Mohamed Ali Al Khalifa is a citizen of Bahrain who was held in extrajudicial detention in the United States Guantanamo Bay detention camps, in Cuba.", "The Department of Defense reports that Al Khalifa was born on July 24, 1979, in Rifah, Bahrain.", "He is a member of the Al Khalifa royal family of Bahrain, related to the king of Bahrain.", "Al Khalifa is a second cousin of the King of Bahrain.", "Al Khalifa, like the other Bahrainis held in Guantanamo, has Joshua Colangelo- Bryan as his lawyer."]], ["Mohammed ibn Salman Al Khalifa", ["Mohammed ibn Salman Al Khalifa(( 1940 -9 November 2009) was the youngest of three sons of the hakim of Bahrain, Salman ibn Hamad Al Khalifa.", "His eldest brother, Isa ibn Salman Al Khalifa, succeeded as hakim( later emir), and his other brother, Khalifa ibn Salman Al Khalifa, is the current prime minister.", "Mohammed was uncle to the reigning king, Hamad ibn Isa Al Khalifa.", "Mohammed served as minister in charge of education and customs administration.", "He also served as the Chief of Police and Public Security from 1961 to 1966, and was the private owner of Umm as Sabaan island.", "He was an active sponsor of sporting events, and he raised camels, horses and falcons.", "Mohammed died on 9 November 2009."]], ["Salman, Crown Prince of Bahrain", ["Prince Salman bin Hamad bin Isa Al Khalifa, Deputy King, Crown Prince of Bahrain( born 21 October 1969) is the heir apparent and first deputy prime minister of the Kingdom of Bahrain.", "He is also the deputy supreme commander of the Bahrain Defense Force."]], ["Hala bint D'aij Al Khalifa", ["Shaikha Hala bint", "D'aij Al Khalifa", "( Arabic: \u0647\u0627\u0644\u0629 \u0628\u0646\u062a \u062f\u0639\u064a\u062c \u0622\u0644 \u062e\u0644\u064a\u0641\u0629, died 10 June 2018) was the former wife of Prince Salman bin Hamad bin Isa Al Khalifa, the Crown Prince, Deputy Supreme Commander and First Deputy Prime Minister, until 2005.", "Hala was the youngest daughter of D'aij bin Khalifa Al Khalifa, the Assistant Under- Secretary of the Ministry of Finance& National Economy.", "She was the Honorary President of the Information Centre for Women& Children, and Chair of the Bahrain Society for Mental Retardation.", "Hala and Salman had two sons and two daughters:", "Her eldest son, Isa is second in line to the throne after his father.", "She died on 10 June 2018."]], ["Isa bin Salman Al Khalifa", ["Isa bin Salman Al Khalifa (3 June 1931 \u2013 6 March 1999) was the first emir of Bahrain from 1961 until his death in 1999.", "Born in Jasra, Bahrain, he became emir upon the death of his father, Salman bin Hamad Al Khalifa."]]]
supporting_facts: [["Hamad bin Isa Al Khalifa", 2], ["Isa bin Salman Al Khalifa", 1]]
evidences: [["Hamad bin Isa bin Salman Al Khalifa", "father", "Isa bin Salman Al Khalifa"], ["Isa bin Salman Al Khalifa", "father", "Salman bin Hamad Al Khalifa"]]
answer: Salman bin Hamad Al Khalifa