Simplify the following text for a Grade 18 native English-speaking person.
Original: The Caucasus Emirate ( Chechen Cyrillic : Ð Ð 1\/4 Ð Ñ Ð Ñ Ð Ð Ð Ð Ð Ð Imarat Kavkaz , ) also known as the Caucasian Emirate is a self-proclaimed virtual state entity , partially successor to the Chechen Republic of Ichkeria and was officially announced on October 31 , 2007 by former President of Ichkeria Dokka Umarov , who became the first Emir .
Simplified: The Caucasus Emirate Cyrillic alphabet : Ð Ð 1\/4 Ð Ñ Ð Ñ Ð Ð Ð Ð Ð Ð Imarat Kavkaz , also known as the Caucasian Emirate is a self-proclaimed virtual state entity , successor to the Chechen Republic of Ichkeria and was officially announced on October 31 , 2007 by former President of Ichkeria Dokka Umarov .