Sentence:  Next year <WSD>is</WSD> the 80 th anniversary of the signing of the treaty between Korea and the United States and experts in Seoul are trying to find the correspondence between Frederick Frelinghuysen , who was secretary of state in 1883 and 1884 , and Gen. Lucius Foote , who was the first minister to Korea . 
Meaning of the word marked with <WSD> tags:  be identical to; be someone or something