Question:
Which political party did Wolfgang Abendroth belong to in Dec, 1928?

Context:
 Wolfgang Abendroth is a member of the Social Democratic Party of Germany from Jan, 1946 to Dec, 1961. 
 Wolfgang Abendroth is a member of the Communist Party of Germany from Jan, 1920 to Jan, 1928. 
 Wolfgang Abendroth is a member of the Communist Party of Germany (Opposition) from Jan, 1928 to Jan, 1930.

Answer:
Question:
Which political party did Wolfgang Abendroth belong to in Dec, 1928?

Context:
 Wolfgang Abendroth is a member of the Social Democratic Party of Germany from Jan, 1946 to Dec, 1961. 
 Wolfgang Abendroth is a member of the Communist Party of Germany from Jan, 1920 to Jan, 1928. 
 Wolfgang Abendroth is a member of the Communist Party of Germany (Opposition) from Jan, 1928 to Jan, 1930.

Answer:
user
Communist Party of Germany (Opposition)
assistant
Question:
Which political party did Wolfgang Abendroth belong to in Dec, 1928?

Context:
 Wolfgang Abendroth is a member of the Social Democratic Party of Germany from Jan, 1946 to Dec, 1961. 
 Wolfgang Abendroth is a member of the Communist Party of Germany from Jan, 1920 to Jan, 1928. 
 Wolfgang Abendroth is a member of the Communist Party of Germany (Opposition) from Jan, 1928 to Jan, 1930.

Answer:
user
Social Democratic Party of Germany
Communist Party of Germany
assistant
Question:
Which political party did Wolfgang Abendroth belong to in Dec, 1928?

Context:
 Wolfgang Abendroth is a member of the Social Democratic Party of Germany from Jan, 1946 to Dec, 1961. 
 Wolfgang Abendroth is a member of the Communist Party of Germany from Jan, 1920 to Jan, 1928. 
 Wolfgang Abendroth is a member of the Communist Party of Germany (Opposition) from Jan, 1928 to Jan, 1930.

Answer:
user
Communist Party of Germany (Opposition)
assistant