Though Mahidevran may not have been a Haseki , she was the mother of Şehzade Mustafa , the eldest surviving son of the reigning Sultan and the most potential heir to the throne .
Head entity: mahidevran Q59080 1
Tail entity: şehzade mustafa Q1251392 14 15
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P25