Sentence:  Other sources of information include the National Concrete Masonry Association , 38 South Dearborn Street , Chicago , Ill. , the Portland Cement Association , 33 West Grand Avenue , Chicago , Ill. , and the Structural Clay Products Association , <WSD>Washington</WSD> , D. C. . 
Meaning of the word marked with <WSD> tags:  the capital of the United States in the District of Columbia and a tourist mecca; George Washington commissioned Charles L'Enfant to lay out the city in 1791