question: Hvem satt en juniorverdensrekord i verdensmesterskap?
context: List of world junior records in athletics
  Verdens juniorrekorder i friidrett er ratifisert av International Association of Athletics Federations. Friidrettsrekorder omfatter den beste prestasjonen til en idrettsutøver før 20-årsdagen deres. Teknisk sett, i alle aldersdivisjoner under 20, beregnes alderen "31. desember i konkurranseåret" for å unngå aldersgruppebytte i en konkurransesesong.
context_en: List of world junior records in athletics
  World Junior Records in the sport of athletics are ratified by the International Association of Athletics Federations. Athletics records comprise the best performance of an athlete before the year of their 20th birthday. Technically, in all under 20 age divisions, the age is calculated "on December 31 of the year of competition" to avoid age group switching during a competitive season.
title_en: List of world junior records in athletics