Hi, 

The general data mining process is composed of different steps from data collection to KDD presented in incremental way on data mining lectures. I need to know what means exactly the returning arrows going from KDD to data collection (as you can see in the image: http://www2.cs.uregina.ca/~dbd/cs831/notes/kdd/kdd.gif). 

I need to know more details about it, and if it's possible please show me a concrete example.

Thank you.

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