Amidst this , in 1954 tragedy struck as he lost his mother to cancer and 4 years later in 1958 he would lose his maternal grandmother Princess Ingeborg of Denmark .
Head entity: princess ingeborg of denmark Q234033 26 27 28 29
Tail entity: mother Q231281 11
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P25