Simplify the following text for a Grade 4 native English-speaking person.
Original: Krematorij ( Ð Ñ Ð Ð 1\/4 Ð Ñ Ð 3\/4 Ñ Ð Ð - `` Crematory '' ) is a Russian rock group .
Simplified: Krematorij ( Russian : Ð Ñ Ð Ð 1\/4 Ð Ñ Ð 3\/4 Ñ Ð Ð ) is a Russian rock band .