Question: The Old Federal Building in Fairbanks was built by William "Mac" MacDonald, who also later built the Federal Building in a city that was incorporated on what date?
Sentence (from "Old Federal Building (Fairbanks, Alaska)"): It originally housed the federal court, post office, and other federal government offices, and the decision to locate it in Fairbanks was critical to the rise of the city's importance; it now houses private offices.
Relevant evidence: No