Simplify the following text for a Grade 10 native English-speaking person.
Original: The brutalist Seacroft Civic Centre stood until its demolition in 1999 , when it was replaced by the Seacroft Green Shopping Centre , which is of a fairly standard design for a large supermarket and purpose built shops .
Simplified: In the 1960s , the Seacroft Civic Centre was built , but it was demolished in 1999 and replaced with the Seacroft Green Shopping Centre which contains a large Tesco .