Question: What is the capital of the district that Wiaga is in?

Context paragraphs:
Builsa District: The Builsa District is one of the nine (9) districts in the Upper East Region of north Ghana.  The capital is Sandema.

Wiaga: Wiaga is a town in the Builsa District of the Upper East Region of Ghana.

Supporting paragraphs: Wiaga Builsa District
Answer: Sandema