Question:
Where was William Penney, Baron Penney educated in Sep, 1934?

Context:
 William Penney, Baron Penney attended University of Groningen from Jan, 1929 to Jan, 1930. 
 William Penney, Baron Penney attended University of Cambridge from Jan, 1933 to Jan, 1935. 
 William Penney, Baron Penney attended University of Wisconsin–Madison from Jan, 1931 to Jan, 1933. 
 William Penney, Baron Penney attended Royal College of Science from Jan, 1927 to Jan, 1929. 
 William Penney, Baron Penney attended Imperial College London from Jan, 1930 to Jan, 1931.

Answer:
University of Cambridge