code: def generate_alchemy_graph(alchemy_uri, prefixes=None, identifier="NautilusSparql"):
      
      registerplugins()
      ident = URIRef(identifier)
      uri = Literal(alchemy_uri)
      store = plugin.get("SQLAlchemy", Store)(identifier=ident)
      graph = Graph(store, identifier=ident)
      graph.open(uri, create=True)
  
      for prefix, ns in (prefixes or GRAPH_BINDINGS).items():
          if prefix == "":
              prefix = "cts"  # Fix until ALchemy Store accepts empty prefixes
          graph.bind(prefix, ns)
  
      return graph, identifier, uri
docs: Generate a graph and change the global graph to this one
  
      :param alchemy_uri: A Uri for the graph
      :param prefixes: A dictionary of prefixes and namespaces to bind to the graph
      :param identifier: An identifier that will identify the Graph root