Learned structures without AGE. Equivalence class of DAGS obtained by search with the BDe score (5 nodes). DAG (e) is also the subDAG obtained from DAG in Figure 2 (a) by deleting AGE. Belief bars represent estimated marginal probabiliti values at each node. A more compact representation would be obtained by removing edge orientation from all arrows, although this would hide the different causal information carried by the above DAGs even if equivalent as regards CI relationships.