input: Kohli was signed up by sports agent Bunty Sajdeh of Cornerstone Sport and Entertainment after the 2008 Under-19 World Cup. Sajdeh recalls, "I didn't go after them after they became stars. In fact, I watched Virat at the 2008 ICC Under-19 World Cup in Kuala Lumpur. I was mighty impressed with his attitude and the way he was marshalling his team. He had that spark. And I told Yuvi to set up the meeting." Sajdeh manages Kohli's endorsement deals, along with those of other Indian cricketers Shikhar Dhawan, Rohit Sharma and Murali Vijay. It was reported in 2013 that Kohli's brand endorsements were worth over Rs100 crore. His bat deal with MRF is said to be the costliest deal in Indian cricket history. In 2017, he signed an eight-year endorsement deal with Puma worth about Rs110 crore, becoming the first Indian sportsperson to sign a Rs100 crore deal with a brand.  In 2014, American Appraisal estimated Kohli's brand value at US$56.4 million placing him fourth on the list of India's most valued celebrity brands. The same year, UK-based magazine SportsPro rated Kohli as the second most marketable athlete in the world behind only Lewis Hamilton, placing him above the likes of Cristiano Ronaldo, Lionel Messi and Usain Bolt. In an October 2016 report by Duff & Phelps on India's most valued celebrity brands, Kohli's brand value was estimated to be US$92 million, second only to that of Bollywood actor Shah Rukh Khan.  In 2017, Kohli was ranked 7th in the list released by Forbes as the Most Valuable Brand among athletes ahead of players like Lionel Messi, Rory McIlroy and Stephen Curry with an estimated brand value of $14.5 million.  As of September 2017, Kohli has endorsement deals with 17 brands. The brands Kohli previously endorsed include 3C Company, Celkon Mobiles, Cinthol (from Godrej), Clear (from Unilever), Fair & Lovely, Fastrack (from Titan), Pepsi, Flying Machine, Mattel, Munch (from Nestle), Oakley, Red Chief Shoes, Royal Challenge (from United Breweries), Sangam Suitings and Toyota Motors.

Answer this question "What sport does Kohli play?"
output: I watched Virat at the 2008 ICC Under-19 World Cup in Kuala Lumpur. I was mighty impressed with his attitude and the way he was marshalling his team.

Question: Abu Bakr as-Siddiq 'Abdallah bin Abi Quhafah (Arabic: 'bw bkr lSdyq `bd llh bn 'by qHf@; c. 573 CE - 22 August 634 CE), popularly known as Abu Bakr ('bw bkr), was a senior companion (Sahabi) and--through his daughter Aisha--the father-in-law of the Islamic prophet Muhammad. Abu Bakr became the first openly declared Muslim outside Muhammad's family. Abu Bakr served as a trusted advisor to Muhammad.

Abu Bakr attended the event of Ghadir Khumm, which took place a few months before Muhammad passed away. According to both Shia and Sunni sources, he was among the many who pledged allegiance to Ali at the event.  In Medina, after the Farewell Pilgrimage and the event of Ghadir Khumm, Muhammad ordered an army under the command of Usama bin Zayd. He commanded all the companions, except for his family, to go with Usama to Syria to avenge the Muslims' defeat at the Battle of Mu'tah. Muhammad gave Usama the banner of Islam on the 18th day of the Islamic month of Safar in the year 11 A.H. Abu Bakr and Umar were among those that Muhammad commanded to join Usama's army.  However, Abu Bakr and Umar resisted going under the command of Usama because they thought that he, who was 18 or 20 at the time, was too young to lead an army, despite Muhammad's teachings that age and standing in society did not necessarily correspond to being a good general.  In response to these worries, the Prophet said: "O Arabs! You are miserable because I have appointed Usama as your general, and you are raising questions if he is qualified to lead you in war. I know you are the same people who had raised the same question about his father. By God, Usama is qualified to be your general just as his father was qualified to be a general. Now obey his orders and go." Whenever Muhammad felt any relief from his fatal sickness, he would inquire as to whether Usama's army had left for Syria yet, and would continue urging his companions to leave for Syria. Muhammad even said, "Usama's army must leave at once. May Allah curse those men who do not go with him." However, while a few companions were ready to join Usama's army, many other companions, including Abu Bakr and Umar, disobeyed Muhammad's orders. It is also noted that this was the only battle expedition where Muhammad urged his companions to go the battle no matter what; for other battles, if someone was unable to go to the fight, Muhammad would let them stay at home.

Using a quote from the above article, answer the following question: What led to his death?
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Answer:
Whenever Muhammad felt any relief from his fatal sickness,