Olav became king together with his half - brothers Sigurd Jorsalfar and Øystein Magnusson when his father Magnus Barefoot died in 1103 .
Head entity: sigurd jorsalfar Q313005 9 10
Tail entity: magnus barefoot Q311996 17 18
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22