Question:
Which position did Sir Horace Rumbold, 9th Baronet hold in Jan, 1928?

Context:
 Sir Horace Rumbold, 9th Baronet holds the position of ambassador of the United Kingdom to Poland from Jan, 1919 to Jan, 1920. 
 Sir Horace Rumbold, 9th Baronet holds the position of ambassador of the United Kingdom to Germany from Jan, 1928 to Jan, 1933. 
 Sir Horace Rumbold, 9th Baronet holds the position of ambassador of the United Kingdom to Spain from Jan, 1924 to Jan, 1928. 
 Sir Horace Rumbold, 9th Baronet holds the position of ambassador of the United Kingdom to Switzerland from Jan, 1916 to Jan, 1919.

Answer:
ambassador of the United Kingdom to Germany