Instructions: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Input: Context: Richard Packard is an American physicist, a professor at the University of California, Berkeley, known for having built the first quantum gyroscope with his colleagues. 
 Question: What is Richard Packard's place of employment?
Output:
university of california, berkeley