List of ambassadors of the United States to China

Columns: Name | Home state | Presented credentials | Terminated
Frederick Low | California | April 27 , 1870 | July 24 , 1873 | Benjamin Avery | California | November 29 , 1874 | November 8 , 1875 | George Seward | California | April 24 , 1876 | August 16 , 1880 | James Burrill Angell | Michigan | August 16 , 1880 | October 4 , 1881 | John Russell Young | New York | August 17 , 1882 | April 7 , 1885 | Charles Harvey Denby | Indiana | October 1 , 1885 | July 8 , 1898 | Edwin H. Conger | Iowa | July 8 , 1898 | April 4 , 1905 | William Woodville Rockhill | District of Columbia | June 17 , 1905 | June 1 , 1909 | William J. Calhoun | Illinois | April 21 , 1910 | February 26 , 1913

Example questions:
Who is the namesake of the state where the American ambassador Robert Milligan McClane is from ? | What is the most populous city in the state American ambassador John W. Davis is from ? | What state was the American ambassador to China , Humphrey Marshall from ? | What institution did the American ambassador to China who worked until July 24 , 1873 oppose ?

Answers:
Henrietta Maria | Indianapolis | Virginia | slavery