e/Women's 400 metres hurdles world record progression

Information
has gloss	eng: The first world record in the women's 400 metres hurdles was recognised by the International Association of Athletics Federations (IAAF) in 1974. The current record is 52.34 seconds, set by Russian Yuliya Pechonkina in 2003.
lexicalization	eng: Women's 400 metres hurdles world record progression
instance of	e/Athletics record progressions