input: 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.

Answer this question "What happened after his death?"
output:

input: Lesnar's next defense was against undefeated top contender Cain Velasquez on October 23 at the Honda Center in Anaheim, California at UFC 121. Dana White announced via SportsNation that the UFC would bring back UFC Primetime to hype the fight. Lesnar was defeated by Velasquez for the title by TKO in the first round. On January 11, 2011, Lesnar was announced as a coach of The Ultimate Fighter Season 13, opposite Junior dos Santos, with the two expected to fight on June 11 at UFC 131, but he was struck with another bout of diverticulitis and had to withdraw from the fight on May 12. He was replaced by Shane Carwin, who ended up losing against dos Santos. Lesnar underwent surgery on May 27 to help battle his problems with diverticulitis. Dana White said that he had a 12-inch piece of his colon removed. In its May 2011 issue, ESPN's magazine published a story listing the highest paid athlete based on base salary and earnings for the most recent calendar year or most recent season in 30 sports. Lesnar topped the list for MMA at $5.3 million, which included his reported bout salaries and estimated pay-per-view bonuses. In the summer of 2011, Lesnar announced that he was returning to action, stating, "I feel like a new man. Healthy. Strong. I feel like I used to feel". His return match was scheduled to be at UFC 141 on December 30 in Las Vegas against former Strikeforce heavyweight champion Alistair Overeem. Overeem won the fight by way of technical knockout in the first round. The result of the fight remains controversial, as Overeem tested positive for elevated levels of testosterone prior to his next fight. Lesnar then announced his retirement from MMA, mentioning his struggles with diverticulitis and saying "tonight was the last time you'll see me in the octagon". Speculation about a return to MMA lasted until March 24, 2015, when Lesnar announced in an interview on SportsCenter that he had re-signed with WWE and officially closed the door on a return to MMA, even though he was offered a deal "ten times more" than what he had made previously in his MMA career. He further elaborated that, while he was training for months for a return to the UFC, he felt "physically great but something was lacking mentally". Lesnar added that "[he's] an older caveman now, so [he] makes smarter caveman decisions" and that he chose to sign with WWE instead of returning to MMA because he could "work part-time with full-time pay".

Answer this question "What title did he win?"
output: Lesnar was defeated by Velasquez for the title by TKO in the first round.

input: Clayton-Thomas left in early January 1972 to pursue a solo career. He was briefly replaced by Bobby Doyle and then Jerry Fisher, who went on to front the next incarnation of Blood, Sweat & Tears. Fred Lipsius left as well and was briefly replaced by Joe Henderson, before Lou Marini settled into the new lineup. Another founding member, Dick Halligan, also departed, replaced by jazz pianist Larry Willis (from the Cannonball Adderley Quintet), and Swedish guitarist Georg Wadenius, from the popular Swedish outfit Made in Sweden, joined as lead guitarist around the same time. The new edition of Blood, Sweat & Tears released New Blood in September 1972, which found the group moving into a more overtly jazz-fusion repertoire. The album broke through the Top 40 chart (the last BS&T LP to do so) and spawned a single ("So Long Dixie", chart peak: 44) that received some airplay. Also included on the record was a cover version of Herbie Hancock's "Maiden Voyage", featuring the voice/guitar soloing of Georg Wadenius. In mid-1973, Katz left to pursue a career as a producer (for Lou Reed and others). Winfield departed as well and was replaced by Tom Malone. Blood, Sweat & Tears' next album, No Sweat (June 1973), continued in a jazz-fusion vein and featured intricate horn work. Tom Malone's stay in the band was brief and he left to make way for jazz trumpeter John Madrid. But Madrid's tenure was likewise short-lived and he never recorded with the band. Both Madrid and Soloff left in early 1974, making way for new horn player/arranger Tony Klatka on their next release, Mirror Image (July 1974), which also saw the addition of vocalist/saxophonist Jerry LaCroix (formerly of Edgar Winter's White Trash), sax player Bill Tillman, bassist Ron McClure and the exodus of original bass player Jim Fielder. This recording features the adoption of a sound pitched between Philly Soul and the mid-1970s albums by Herbie Hancock's Headhunters, along with aspirations to Chick Corea's jazz-fusion group Return to Forever. Jerry LaCroix left BS&T to join Rare Earth after playing his final show with them at Wollman Rink in New York's Central Park on July 27, 1974. Luther Kent, a blues singer from New Orleans, was recruited to replace LaCroix.

Answer this question "What else is significant about this era?"
output:
Luther Kent, a blues singer from New Orleans, was recruited to replace LaCroix.