Question: Asier Benito Sasiain, is a Spanish footballer who plays for which reserve team of Athletic Bilbao, club based in Bilbao, in the autonomous community of Basque Country, and officially named Athletic Club "B"  ?
Sentence (from "Athletic Bilbao B"): Bilbao Athletic, officially named Athletic Club "B" is the reserve team of Athletic Bilbao, club based in Bilbao, in the autonomous community of Basque Country.
Relevant evidence: Yes