Sol collaborated with an American rapper from Seattle, Washington, who has released how many albums since 2000?
Sol (musician):  Sol has collaborated with other artists such as the Macklemore, Blue Scholars, Grynch, and The Physics. Macklemore: Benjamin Hammond Haggerty (born June 19, 1983), known by his stage name Macklemore ( ), and formerly Professor Mack Lemore, is an American rapper from Seattle, Washington. Macklemore:  Since 2000, he has independently released one mixtape, three EPs, and four albums.
four