Hello @dean1962,
starting workflow examples can be found in KNIME Explorer:
Iris data set is pretty famous data set (see here for more on it: https://en.wikipedia.org/wiki/Iris_flower_data_set) and is part of many workflows. The one you need depends on the reader node you are using in specific workflow. (Probably you have some older workflow where it wasn’t part of it.)
The page to start learning KNIME is following: https://www.knime.com/learning. There you have all available materials, info and links to learn more about KNIME.
Also check this forum topic for more info: How to learn KNIME online - fast
Welcome to Community and hope this helps!
Br,
Ivan