Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- The United Nations is demanding full access to refugee camps that are home to an estimated quarter of a million people fleeing war in Sri Lanka, the United Nations Children's Fund said Tuesday. Displaced Tamil civilians at Manic farm in the northern Sri Lankan district of Vavuniya on May 7, 2009 "People are arriving into camps sick, malnourished and some with untended wounds of war," UNICEF Executive Director Ann Veneman said in a written statement. "... Water and sanitation needs are critical." About 65,000 people have fled what had been the fighting zone in northeast Sri Lanka over the past few days, the United Nations said Monday, bringing to 265,000 the number of internally displaced people.U.N. demanding full access to refugee camps, home to people fleeing civil warCamps are home to an estimated quarter of a million people65,000 people have fled fighting over past few days; 265,000 now internally displacedU.N. says its access to camps in Vavuniya had been curtailed in recent days 
 Question:_ and others are supplying food and water, emergency health kits, cooking pots, water purification tablets, and student and teacher kits, the agency said.

United Nations