When Ferdinand 's father , Alfonso IX of León , died in 1230 , his will delivered the kingdom to his older daughters Sancha and Dulce , from his first marriage to Teresa of Portugal .
Head entity: dulce Q2536672 25
Tail entity: teresa of portugal Q2594188 32 33 34
Relation (head \u2192 tail): P25
Inverse relation (tail \u2192 head): P40