What tutorial are you following? The answer is probably in dataset 20, not dataset 21, and the tutorial should include the answer. But that’s just a guess – it looks like you may have missed a step, creating empty datasets in the middle of the history.
This is a different version (from GTN) for comparison: Galaxy 101
Above is data set 20. I am following Galaxy 101 tutorial in Introduction to Galaxy analysis. I am talking about last question in this tutorial and answer is not given in the tutoril. Thanks for replying.