When King Albert died in 1439 , Nicholas supported his widow , Elizabeth of Luxembourg , in her struggle to secure the Holy Crown of Hungary for her son , Ladislaus the Posthumous .
Head entity: ladislaus the posthumous Q116382 30 31 32
Tail entity: albert Q157112 2
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40