Question: Binti is a novella written by an author of what minority? 
Sentence (from "Nnedi Okorafor"): Nnedi Okorafor (full name: Nnedimma Nkemdili Okorafor; previously known as Nnedi Okorafor-Mbachu; born April 8, 1974) is a Nigerian American writer of fantasy, science fiction, and speculative fiction.
Relevant evidence: Yes