Hint: To do so, we start tree-puzzle in the same directory as the dataset - enter the dataset name when prompted for. To measure the phylogenetic content of a dataset switch the type of analysis to likelihood mapping ('b') and do not group the sequences. Start the mapping analysis typing 'y'.
Examine the result of the datasets in dataset-name.puzzle with a text editor and the likelihood mapping diagram dataset-name.eps (or with a postscript viewer like gsview.
Add the percentages in the corners to the the amount on completely resolved quartets. Summing the in the rectangles gives you the amount of partially resolved quartets. The percentage in the center gives the number of quartets which cannot be resolved. The last number should not be high.