Simplify the following text for a Grade 7 native English-speaking person.
Original: Fedora Core 1 was the first version of Fedora and was released on November 6 , 2003 , and was codenamed Yarrow .
Simplified: Fedora Core 1 was the first version of Fedora and was released on November 6 , 2003 . It was codenamed Yarrow .