question: Who claimed responsibility for the hotel attack that killed Carsten Thomassen?
answer: the Taliban
context: Title: 2014 Kabul Serena Hotel attack
  Passage: The 2014 Kabul Serena Hotel attack was a mass shooting at the restaurant of the Kabul Serena Hotel, in Kabul, Afghanistan on March 20, 2014 for which the Taliban claimed responsibility.  Four teenage gunmen entered the restaurant of the hotel, opening fire with handguns against patrons and sparking a three-hour standoff with Afghan security forces.  At least nine people were reported killed in the assault, including five Afghans and four foreigners.  Among the victims was former Paraguyan diplomat Luis Maria Duarte, who was in the country as an international observer in the upcoming Presidential elections.  Afghan authorities later announced that four women and two children were among the victims, which included nationals of New Zealand, Pakistan, India and Canada.  At least two of the hotel's security guards were injured during the assault as well.
  Title: 2008 Kabul Serena Hotel attack
  Passage: The 2008 Kabul Serena Hotel attack was an attack on the gym of the Kabul Serena Hotel, in Kabul, Afghanistan on January 14, 2008 for which the Taliban claimed responsibility.
  Title: 23 May 2016 Yemen bombings
  Passage: On 23 May 2016, two suicide bombings, conducted by the Islamic State of Iraq and the Levant, killed at least 45 potential army recruits in Aden, Yemen.  The first attack, which targeted a lineup, killed 20.  The second attack, which occurred inside the base, killed 25.  The Islamic State of Iraq and the Levant claimed responsibility for the attack.  The attack was preceded by the 2016 Yemen Police bombings in the Yemeni city of Mukalla, which killed more than 48 people and injured over 60.
  Title: Carsten Thomassen (journalist)
  Passage: Carsten Thomassen (15 May 1969 – 14 January 2008) was a Norwegian journalist, political commentator and war correspondent for the Norwegian daily newspaper "Dagbladet".  He had earlier covered the 2004 Indian Ocean earthquake from Thailand and Indonesia.  He was killed in the 2008 Kabul Serena Hotel attack in Kabul, Afghanistan.
citations: Carsten Thomassen (journalist) 2008 Kabul Serena Hotel attack