public void Execute(Item startItem)
{
// get items
var items = ItemRetriever.GetItems(startItem);
// items -> request models
var requestModelCollection = RequestParser.Convert(items);
// serialize request models
var requestData = RequestModelCollectionSerializer.Convert(requestModelCollection);
// execute request & get response
Task <string> task =
Task.Run(async() => await KeyPhrasesRequester.GetResponse(requestData));
//var responseData = KeyPhrasesRequester.GetResponse(requestData);
// parse response
var responseModelCollection = ResponseParser.Convert(task.Result);
// handle parsed response
ResponseHandler.DoHandleResponse(responseModelCollection);
}