JSON data getting cut off when loaded using REST to ClientDataSet

I used RestClient, RestRequest, RestResponse, RestResponseDatasetAdapter to load JSON  from website to ClientDataSet.

Problem is that when I try to display a long text field into a memo, I only get part of text .

memo1.lines.text := ClientDataSet.FieldByName('Memo').asstring;

Please advice what do I need to do

Thanks.