Question: Yoko Ono's son, who was a member of Between My Head and the Sky, was born on what date?
Sentence (from "Sean Lennon"): Sean Taro Ono Lennon (Japanese: 小野 太郎 , Hepburn: Ono Tarō , born October 9, 1975) is an American singer, songwriter and actor.
Relevant evidence: Yes