Question: What what the children's picture book "Rosa"'s character an activist in?
Sentence (from "Charlotte Zolotow Award"): The Zolotow award was established in 1998 by the Cooperative Children's Book Center (CCBC) at the University of Wisconsin–Madison School of Education and named to honor the work of Charlotte Zolotow, an American children's book editor and author.
Relevant evidence: No