Original sentence: After the establishment of the Hong Kong Housing Authority in 1973, Lower Ngau Tau Kok Estate was divided into two parts: Lower Ngau Tau Kok (I) Estate comprising Blocks 1 to 7 and Lower Ngau Tau Kok (II) Estate comprising Blocks 8 to 14.The demolition of Lower Ngau Tau Kok (II) Estate is scheduled to start in 2009.The housing blocks of Lower Ngau Tau Kok (I) Estate were demolished in 2003
Edited sentence: The first half of the estate was demolished in 2003, with the second half following in 2009