Sentence:  Being a teacher of <WSD>American</WSD> literature , I remembered Whittier 's `` Massachusetts to Virginia '' , where he said : `` But that one dark loathsome burden ye must stagger with alone , And reap the bitter harvest which ye yourselves have sown '' . 
Meaning of the word marked with <WSD> tags:  of or relating to the United States of America or its people or language or culture