Update app.py

app.py

@@ -24,7 +24,7 @@ def render_dependency_tree(words, parents, labels):
 
     # Draw the graph
     nx.draw(G, pos, ax=ax, with_labels=True, labels=nx.get_node_attributes(G, 'label'), 
-            arrows=True, node_color='#ffffff', node_size=2000, node_shape='s', font_size=24
+            arrows=True, node_color='#ffffff', node_size=0, node_shape='s', font_size=24, bbox = dict(facecolor = "white")
     )
 
     # Draw edge labels