venn = Venn(list(A=1:5,B=2:7,C=3:6,D=4:9))
obj = process_data(venn)
venn_regionlabel(obj) # return regionLabel data
venn_regionedge(obj) # return regionEdge data
venn_setlabel(obj) # return setLabel data
venn_setedge(obj) # return setEdge data
venn_set(obj) # set items
venn_region(obj) # region items
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