Sampson's example

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diff --git a/examples/drawing/sampson.py b/examples/drawing/sampson.py
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+#!/usr/bin/env python
+"""
+Sampson's monastery data.
+
+Shows how to read data from a zip file and plot multiple frames. 
+
+"""
+__author__ = """Aric Hagberg (hagberg@lanl.gov)"""
+#    Copyright (C) 2010 by 
+#    Aric Hagberg <hagberg@lanl.gov>
+#    Dan Schult <dschult@colgate.edu>
+#    Pieter Swart <swart@lanl.gov>
+#    All rights reserved.
+#    BSD license.
+
+import zipfile
+import networkx as nx
+import matplotlib.pyplot as plt
+
+zf = zipfile.ZipFile('sampson_data.zip') # zipfile object
+e1=zf.open('samplike1.txt') # read info file
+e2=zf.open('samplike2.txt') # read info file
+e3=zf.open('samplike3.txt') # read info file
+G1=nx.read_edgelist(e1,delimiter='\t')
+G2=nx.read_edgelist(e2,delimiter='\t')
+G3=nx.read_edgelist(e3,delimiter='\t')
+pos=nx.spring_layout(G3,iterations=100)
+plt.clf()
+
+plt.subplot(221)
+plt.title('samplike1')
+nx.draw(G1,pos,node_size=50,with_labels=False)
+plt.subplot(222)
+plt.title('samplike2')
+nx.draw(G2,pos,node_size=50,with_labels=False)
+plt.subplot(223)
+plt.title('samplike3')
+nx.draw(G3,pos,node_size=50,with_labels=False)
+plt.subplot(224)
+plt.title('samplike1,2,3')
+nx.draw(G3,pos,edgelist=G3.edges(),node_size=50,with_labels=False)
+nx.draw_networkx_edges(G1,pos,alpha=0.25)
+nx.draw_networkx_edges(G2,pos,alpha=0.25)
+plt.savefig("sampson.png") # save as png
+plt.show() # display
+
diff --git a/examples/drawing/sampson_data.zip b/examples/drawing/sampson_data.zip
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index 00000000..2a72b375
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+++ b/examples/drawing/sampson_data.zip