question: Coverage of which international situation from 2015 earned the Pulitzer prize for the photojournalist Sergey Ponomarev?
answer: European migrant crisis
context: Title: Sergey Ponomarev (photographer)
  Passage: Sergey Igorevich Ponomarev (Russian: Сергей Игоревич Пономарёв , 11 December 1980, Moscow) is a Russian photographer.  In 2016 he shared a Pulitzer Prize for Breaking News Photography with Mauricio Lima, Tyler Hicks, and Daniel Etter "For photographs that captured the resolve of refugees, the perils of their journeys and the struggle of host countries to take them in."  Specifically, their coverage of the European migrant crisis, produced for The New York Times, was cited.  He became the second individual Pulitzer Prize winner from Russia since 1992, after Alexander Zemlianichenko (1997).  In 2017, he was awarded the Robert Capa Gold Medal (shared with Bryan Denton) for his coverage of the war in Iraq.
  Title: Pulitzer Prize for Photography
  Passage: The Pulitzer Prize for Photography was one of the American Pulitzer Prizes annually awarded for journalism.  It was inaugurated in 1942 and replaced by two photojournalism prizes in 1968: the Pulitzer Prize for Feature Photography and "Pulitzer Prize for Spot News Photography".  The latter was renamed for Pulitzer Prize for Breaking News Photography in 2000.
  Title: Daniel Berehulak
  Passage: Daniel Berehulak (born 1975) is an Australian photographer and photojournalist based in New Delhi.  A native of Sydney, Australia and a regular contributor to "The New York Times" he has visited more than 60 countries covering history-shaping events, including the Iraq and Afghan wars, the trial of Saddam Hussein, child labour in India and the return of Benazir Bhutto to Pakistan.  He has also documented numerous social issues and people coping with the aftermath of disasters, including the Japan tsunami and the Chernobyl nuclear fallout.  In 2015, he was awarded the Pulitzer Prize for feature photography for his coverage of the Ebola epidemic in West Africa, and was a Pulitzer Prize finalist for his coverage of the Pakistan floods in 2010.  His photography has earned five World Press Photo awards and he has twice been named Photographer of the Year by Pictures of the Year International (2014 and 2015).  In 2016, he was named Photojournalist of the Year (large-circulation publications) in the National Press Photographers Association’s Best of Photojournalism contest.
  Title: European migrant crisis
  Passage: The European migrant crisis, or the European refugee crisis, is a term given to a period beginning in 2015 when rising numbers of people arrived in the European Union (EU), travelling across the Mediterranean Sea or overland through Southeast Europe.  These people included asylum seekers, but also others, such as economic migrants and some hostile agents, including Islamic State militants disguised as refugees or migrants.
citations: Sergey Ponomarev (photographer) European migrant crisis