code: def jens_transformation_beta(graph: BELGraph) -> DiGraph:
      
      result = DiGraph()
  
      for u, v, d in graph.edges(data=True):
          relation = d[RELATION]
  
          if relation == NEGATIVE_CORRELATION:
              result.add_edge(u, v)
              result.add_edge(v, u)
  
          elif relation in CAUSAL_INCREASE_RELATIONS:
              result.add_edge(v, u)
  
          elif relation in CAUSAL_DECREASE_RELATIONS:
              result.add_edge(u, v)
  
      return result
docs: Apply Jens' Transformation (Type 2) to the graph.
  
      1. Induce a sub-graph over causal and correlative relations
      2. Transform edges with the following rules:
          - increases => backwards decreases
          - decreases => decreases
          - positive correlation => delete
          - negative correlation => two way decreases
  
      The resulting graph can be used to search for 3-cycles, which now symbolize stable triples where ``A -> B``,
      ``A -| C`` and ``B negativeCorrelation C``.