Simplify the following text for a Grade 3 native English-speaking person.
Original: Stefka Kostadinova ( Bulgaria ) has held the women 's world record 2.09 m since 1987 , also the longest-held record in the event .
Simplified: The women 's world record of 2.09 metres is held by Stefka Kostadinova . It was set in 1987 .