Since Jmp 17, Graph Builder can interprete columns with modeling type Multiple Response in a way that the entries are split and the values show up one by one. Amazingly useful!!
But there seems to be an issue if the column is used in different drop zones.
If the user wants to find out which of the students play multiple sports , the result looks boring:
there is just a diagonal line 
Seems that Jmp splits the students into smaller entities with a well defined sports activity.
So Katie, who plays Soccer and Tennis becomes Katie1 (soccer) + Katie2(tennis) without a link between Katie1 and Katie2.
Is this issue already known and will it be fixed in Jmp 17.2?
Is there a workaround in Jmp17.1?
dt = Open( "$SAMPLE_DATA/Big Class Families.jmp" );
dt << Graph Builder(
Variables(X( :sports ), Y( :sports )),
Elements( Heatmap( X,Y ) )
);
