As in 1138 Salomea gave birth the future Casimir II the Just , Agnes was born a year earlier . Oswald Balzer , " Genealogia Piastów " , Kraków 1895 , p. 183 .
Head entity: casimir ii the just Q53456 8 9 10 11
Tail entity: salomea Q68567 3
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P25