How to read/append the data from all the ExampleSet objects under an IOObjectCollection?

Hi, At some point in my workflow, I am getting an IOObjectCollection which has several ExampleSet objects. Each ExampleSet (Table data) has several Examples and attributes. and these attributes in each Example are different because of which I am not able to Append/Join the Examples. My ultimate goal is to loop over the data in each ExampleSet and append them and then write the data into a single file (csv or excel). I have tried different loop nodes but only data from the first ExampleSet is being returned. I am not sure how do I append the data from all the ExampleSets under this IOObjectCollection. 

Note: I am a newbie to Rapidminder