Simplify the following text for a Grade 10 native English-speaking person.
Original: Juliana ( Juliana Luise Emma Marie Wilhelmina van Oranje-Nassau ; 30 April 1909 â `` 20 March 2004 ) was Queen of the Kingdom of the Netherlands from her mother 's abdication in 1948 to her own in 1980 .
Simplified: Juliana ( Juliana Louise Emma Marie Wilhelmina ; 30 April 1909 â `` 20 March 2004 ) was the Queen regnant of the Kingdom of the Netherlands between 1948 and 1980 .