Question: What African American man was the most recent Democratic mayor of New York City before Bill de Blasio?
Sentence (from "New York City Public Advocate election, 2009"): The Democratic candidate, Bill de Blasio, won election with 77% of the vote against 18% for the Republican nominee, Alex Zablocki, 3.6% for the Conservative nominee, William Lee, and 1.7% for two others.
Relevant evidence: No