Simplify the following text for a Grade 10 native English-speaking person.
Original: The Transgender Pride flag was created by Monica Helms in 1999 , and was first shown at a pride parade in Phoenix , Arizona , United States in 2000 .
Simplified: The Transgender Pride flag was made by a woman named Monica Helms , and was first seen at a pride parade in Phoenix , Arizona , United States in 2000 .