Statements (5)
| Predicate | Object |
|---|---|
| gptkbp:bfsLayer |
4
|
| gptkbp:bfsParent |
gptkb:Jean_Piaget
gptkb:Piaget |
| gptkbp:age |
12 years and up
|
| https://www.w3.org/2000/01/rdf-schema#label |
formal operational stage
|