<human>: Q: What work did Von Nemann do in Berlin in 1930 and Princeton 1935 - 39?
 A: Also, my work on various forms of operator theory, Berlin 1930 and Princeton 1935–1939; on the ergodic theorem, Princeton, 1931–1932."
 Does the answer correctly answer the question

OPTIONS:
- yes
- no
<bot>: yes