Though Yelü Bei was designated heir apparent in 916 , the empress dowager Shulü Ping did not consider him to be worthy and managed to have her second son Deguang succeed to the throne .
Head entity: yelü bei Q1036784 1 2
Tail entity: shulü ping Q907847 13 14
Relation (head \u2192 tail): P25
Inverse relation (tail \u2192 head): P40