Passage: In February 1980 the United Nations established the Working Group on Enforced or Involuntary Disappearances, "the first United Nations human rights thematic mechanism to be established with a universal mandate". Its main task "is to assist families in determining the fate or whereabouts of their family members who are reportedly disappeared". In August 2014, the Working Group reported 43,250 unresolved cases of disappearances in 88 different States.The International Convention for the Protection of All Persons from Enforced Disappearance, adopted by the UN General Assembly on 20 December 2006, also states that the widespread or systematic practice of enforced disappearances constitutes a crime against humanity. It gives victims' families the right to seek reparations, and to demand the truth about the disappearance of their loved ones. The Convention provides for the right not to be subjected to enforced disappearance, as well as the right for the relatives of the disappeared person to know the truth. The Convention contains several provisions concerning prevention, investigation and sanctioning of this crime, as well as the rights of victims and their relatives, and the wrongful removal of children born during their captivity. The Convention further sets forth the obligation of international co-operation, both in the suppression of the practice, and in dealing with humanitarian aspects related to the crime. The Convention establishes a Committee on Enforced Disappearances, which will be charged with important and innovative functions of monitoring and protection at international level. Currently, an international campaign of the International Coalition against Enforced Disappearances is working towards universal ratification of the Convention.

Question: What right do the relatives have?
right for the relatives of the disappeared person to know the truth