You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Multiracial_American

Context:
The writer Sherrel W. Stewart's assertion that "most" African Americans have significant Native American heritage, is not supported by genetic researchers who have done extensive population mapping studies. The TV series on African-American ancestry, hosted by the scholar Henry Louis Gates, Jr., had genetics scholars who discussed in detail the variety of ancestries among African Americans. They noted there is popular belief in a high rate of Native American admixture that is not supported by the data that has been collected. (Reference is coming)

Question:
Who said many African Americans have NAtive American heritage?

Sherrel W. Stewart