Processing song lyrics to display a tag cloud. The overview of the process is:
1. Read the song data (Song info.table file) with Table Reader
2. Select a song of your choice
3. Converting lyrics into document data type
4. Coverting all letters to lower case letters
5. Removing all punctuation marks
6. Creating a bag of words -- a list of unique words appearing in the document
7. Counting how many times each word appears in the document
8. Visualization with the tag cloud.

Session 2 - Display

Workflow 01 Text Processing

1. Reading the song info table

2. Selecting a song by adjusting Row Filter

3. Converting the lyrics to document data type. Adding the title and the singer. The new column "Document" is added to the table. "Document" can be visualized by the Document Viewer node.

4.Converting all letters in the document to lower case

5.Removing all punctuation marks from the document data

6. Creating a bag of words from the document data. A bag of words is a collection of dintinct words appearing in the document

7. Counting how many times each word appears in the document. Also, converting Term data type to String data type

8. Generating a word cloud

Steps 3-7 above are turned into a metanode "Term frequency"

Bonus -- Simplified workflow with a metanode