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 , Washington , <WSD>D.</WSD> C. . 
Meaning of the word marked with <WSD> tags:  the district occupied entirely by the city of Washington; chosen by George Washington as the site of the capital of the United States and created out of land ceded by Maryland and Virginia