Simplify the following text for a Grade 10 native English-speaking person.
Original: The Estates Theatre was annexed to the National Theatre in 1948 and currently draws on three artistic ensembles , opera , ballet , and drama , which perform at the Estates Theatre , the National Theatre ( NÃ rodnÃ divadlo ) , and the Kolowrat Theatre ( Divadlo Kolowrat ) .
Simplified: The same people also perform at the National Theatre ( NÃ rodnÃ divadlo ) , and the Theatre Kolowrat ( Divadlo Kolowrat ) .