I have a table with 3 columns. 2 of the columns include
the X and Y values for the plot (results should be one
line plotted on the graph.) I want the 3rd column values
to act as corresponding labels to the plots. Example:

x y
A 1 4
B 2 3
C 3 2
D 4 1

So (1,4) is one point, (2,4), etc. I need the (1,4) point
to be labeled as A. Is it possible? Any help is
appreciated!!