Gerard was father to Alberada of Buonalbergo , who married Robert Guiscard and mother to Bohemond I of Antioch .
Head entity: bohemond i of antioch Q220806 15 16 17 18
Tail entity: robert guiscard Q203792 10 11
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40