Simplify the following text for a Grade 7 native English-speaking person.
Original: A Teachta DÃ la , usually abbreviated as TD in English , is a member of DÃ il Ã ireann , the lower house of the Oireachtas ( the Irish Parliament ) .
Simplified: A Teachta DÃ la , is a member of DÃ il Ã ireann , the lower house of the Irish parliament .