Question: Robinson's Onion grows in Ferry County in a specific state; what is the capital of that state?

Related documents: [0]  [DOC] Washington ( ), officially the State of Washington, is a state in the Pacific Northwest region of the United States. Named after George Washington, the first President of the United States, the state was made out of the western part of the Washington Territory, which had been ceded by Britain in 1846 in accordance with the Oregon Treaty in the settlement of the Oregon boundary dispute. It was admitted to the Union as the 42nd state in 1889. Olympia is the state capital. Washington is sometimes referred to as Washington State to distinguish it from Washington, D.C., the capital of the U.S., which is often shortened to Washington. [END] 
[1]  [DOC] Allium robinsonii, the Columbia River onion or Robinson's onion, is a rare plant species native to the US States of Washington and Oregon, although some studies suggest that the Oregon populations may now be extinct. The species has been reported from 5 counties in Washington (Ferry, Yakima, Grant, Franklin and Benton) and 5 in Oregon (Umatilla, Morrow, Gilliam, Sherman and Wasco). It is found in sand and gravel deposits along the lower Columbia River and some of its tributaries, usually at elevations less than 200 m. The species is also cultivated as an ornamental in other regions, including in Europe. [END]  
Answer: Olympia
Olympia