while (<DATA>) {
    if (/\bHERE IS THE DATA PLACED/) {
         s/\bHERE IS THE DATA PLACED //;
         print $_;
    }else{
    next;
    }
}

__DATA__
HERE IS THE DATA PLACED ABC;
DO NOT ENTER PLACED BCD;
HERE IS THE DATA PLACED ABC;
WHO ARE U PLACED ABC;

__OUTPUT__
ABC;
ABC;