Question: What number president was the person who was supported by Deadheads for Obama?

full_context: Document 1: Change Is Now: Renewing America's Promise: Change is Now: Renewing America's Promise is a compilation album released on April 28, 2009 through Hidden Beach Recordings in conjunction with the Presidential Inaugural Committee. The album includes previously released tracks from Wilco, Stevie Wonder, Death Cab for Cutie, and Common. An accompanying DVD features eight speeches by Barack Obama, starting with the campaign announcement in Springfield, Illinois and ending with the election night victory speech in Chicago. The album sold retail online and at inaugural events in Washington.
Document 2: Barack Obama presidential campaign, 2008: The 2008 presidential campaign of Barack Obama, then junior United States Senator from Illinois, was announced on February 10, 2007 in Springfield, Illinois. After winning a majority of delegates in the Democratic primaries of 2008, on August 23, leading up to the convention, the campaign announced that Senator Joe Biden of Delaware would be the Vice Presidential nominee. At the 2008 Democratic National Convention on August 27, Barack Obama was formally selected as the Democratic Party nominee for President of the United States in 2008. He was the first African American in history to be nominated on a major party ticket.
Document 3: Presidency of Barack Obama: The presidency of Barack Obama began at noon EST on January 20, 2009, when Barack Obama was inaugurated as President of the United States, and ended on January 20, 2017. Obama, a Democrat, took office as the 44th United States president following a decisive victory over Republican John McCain in the 2008 presidential election. Four years later, in the 2012 election, he defeated Mitt Romney to win re-election. He was the first African American president, the first multiracial president, the first non-white president, and the first president to have been born in Hawaii. Obama was succeeded by Republican Donald Trump, who won the 2016 presidential election.
Document 4: Bob Weir: Robert Hall Weir ( ; born October 16, 1947) is an American singer-songwriter and guitarist, best known as a founding member of the Grateful Dead. After the Grateful Dead disbanded in 1995, Weir performed with The Other Ones, later known as The Dead, together with other former members of the Grateful Dead. Weir also founded and played in several other bands during and after his career with the Grateful Dead, including Kingfish, the Bob Weir Band, Bobby and the Midnites, Scaring the Children, RatDog and Furthur, co-led by former Grateful Dead bassist Phil Lesh. In 2015, Weir, along with former Grateful Dead members Mickey Hart and Bill Kreutzmann, joined with Grammy-winning singer/guitarist John Mayer to form the band Dead & Company. Weir continued to tour with Dead & Company in 2016 and 2017.
Document 5: United States presidential election, 2008: The United States presidential election of 2008 was the 56th quadrennial presidential election. It was held on Tuesday, November 4, 2008. Democratic Party nominees Barack Obama, a U.S. Senator from Illinois, and his running mate Joe Biden, a long-time U.S. Senator from Delaware, defeated Republican Party nominees John McCain, a long-time and current U.S. Senator from Arizona, and his running mate Sarah Palin, a Governor of Alaska. Obama became the first African American ever to be elected president of the United States, and Joe Biden became the first Roman Catholic ever elected vice president.
Document 6: Timeline of the presidency of Barack Obama: Barack Obama was elected President of the United States on November 4, 2008 and his first inauguration occurred on January 20, 2009. Re-elected on November 6, 2012, his second inauguration was on January 21, 2013. For President Obama's first 100 days in office, see First 100 days of Barack Obama's presidency. For his time as President-elect, see Presidential transition of Barack Obama. The following articles cover the timeline of the presidency of Barack Obama:
Document 7: Timeline of the presidency of Barack Obama (2009): The following is a timeline of the Presidency of Barack Obama from his inauguration as president of the United States on January 20, 2009, to December 31, 2009. For his time as President-elect, see the Presidential transition of Barack Obama; for a detailed account of his first months in office, see First 100 days of Barack Obama's presidency; for a complete itinerary of his travels, see List of presidential trips made by Barack Obama.
Document 8: Deadheads for Obama: Deadheads for Obama is the name given to the February 4, 2008 reunion concert of three former members of the Grateful Dead at The Warfield in San Francisco. The show, performed one day before the Super Tuesday primary elections, was an act of support for Democratic presidential candidate Barack Obama, and featured former Dead members Phil Lesh, Bob Weir, and Mickey Hart, as well as John Molo, Jackie Greene, Steve Molitz, Mark Karan and Barry Sless.
Document 9: Barack Obama Sr.: Barack Hussein Obama Sr. ( ; 18 June 1936 – 24 November 1982) was a Kenyan senior governmental economist and the father of Barack Obama, the 44th President of the United States. He is a central figure of his son's memoir, "Dreams from My Father" (1995). Obama married in 1954 and had two children with his first wife, Kezia. He was selected for a special program to attend college in the United States and studied at the University of Hawaii. There, Obama met Stanley Ann Dunham, whom he married in 1961, and with whom he had a son, Barack II. She divorced him three years later. The elder Obama later went to Harvard University for graduate school, where he earned an M.A. in economics, and returned to Kenya in 1964. He saw his son Barack once more, when the boy was about ten.
Document 10: Oprah Winfrey's endorsement of Barack Obama: Oprah Winfrey's endorsement of Barack Obama was one of the most widely covered and studied developments of the 2008 presidential campaign. Winfrey has been described as for her impact on culture and her proven record as a taste-maker and trend-setter, and there was much interest in whether that influence could translate politically since she had never before endorsed a candidate. Winfrey first endorsed Obama in September 2006 before he had even declared himself a candidate. In May 2007 Winfrey made her first endorsement of candidate Obama, and in December 2007, she made her first campaign appearances for him. Two economists estimate that Winfrey’s endorsement was worth over a million votes in the Democratic primary race and that without it, Obama would have lost the nomination. Then-Governor of Illinois Rod Blagojevich claimed that the endorsement was so significant in electing Obama president that he considered offering Obama's former seat in the Senate to Winfrey.
Document 11: Iowa Democratic caucuses, 2008: The Iowa Democratic Presidential Caucus occurred on January 3, 2008, and was the state caucuses of the Iowa Democratic Party. It was the first election for the Democrats of the 2008 presidential election. Also referred to as "the First in the Nation Caucus," it was the first election of the primary season on both the Democratic and Republican sides. Of the eight major Democratic presidential candidates, then-U.S. Senator Barack Obama of Illinois received the most votes and was ultimately declared the winner of the Iowa Democratic Caucus of 2008, making him the first African American to win the caucus. Former U.S. Senator John Edwards of North Carolina came in second place and then-U.S. Senator Hillary Clinton of New York finished third, though Clinton received more delegates than Edwards. Campaigning had begun as early as two years before the event.
Document 12: A Gathering of the Tribes: A Gathering of the Tribes was a two-day music and culture festival organized by Ian Astbury and promoter Bill Graham, held in California in October 1990. It is considered the precursor to the Lollapalooza touring festivals of the 1990s, an opinion shared by Astbury himself. The festival was held at the Shoreline Amphitheatre in Mountain View on October 6 and the Pacific Amphitheatre in Costa Mesa on October 7. The event was intended to raise money for and awareness of Native-American-related causes. A performance by the American Indian Dance Theatre preceded the festival each day. The concert grounds also hosted tents for Act Up, Amnesty International, Greenpeace, Rock the Vote, and local animal rights organizations.
Document 13: Gob Roberts: Gob Roberts is Tim Robbins' punk rock cover band during the Vote for Change tour in 2004. After the announcement of the tour, Tim Robbins' band joined the bill with Pearl Jam and Death Cab for Cutie to trek across swing states. At each of these shows, a minor skit with the help of Eddie Vedder coerced audience members into believing that Tim Robbins was a Republican senator. On every night of the tour, Tim Robbins joined Pearl Jam to play a cover of "The New World" by X.
Document 14: Barack Obama: Barack Hussein Obama II ( ; born August 4, 1961) is an American politician who served as the 44th President of the United States from 2009 to 2017. He is the first African American to have served as president. He previously served in the U.S. Senate representing Illinois from 2005 to 2008 and in the Illinois State Senate from 1997 to 2004.
Document 15: 2008 Democratic National Convention: The United States 2008 Democratic National Convention was a quadrennial presidential nominating convention of the Democratic Party where it adopted its national platform and officially nominated its candidates for President and Vice President. The convention was held in Denver, Colorado, from August 25 to August 28, 2008, at Pepsi Center. Senator Barack Obama from Illinois gave his acceptance speech on August 28 at Invesco Field in what the party called an "Open Convention". Denver last hosted the Democratic National Convention in 1908. Obama became the party's first African-American nominee for President. Senator Joe Biden from Delaware was nominated for Vice President.
ground_truth: 44th