how to read documents with their file names in exampleset

I would like to read some document files from a folder (not read all files in folder).  The file names which will be read are saved in an excel file. 

The read document operator can be used to read file by giving file name. I can use read excel operator to load file name file to exampleset, and get each file name. My question is how to use obtained file name from exampleset to pass read document operator. 

Is there anyone who can help me for this question?

Thank you very much.