Use a disfluent question or a proper question and find the answer to the question based on the given context or return None if an answer can't be found. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.

proper question: What was erected in South Africa by Duke Kent-Brown to protest Harvard?
disfluent question: What was reduced by no erected in South Africa by Duke Kent-Brown to protest Harvard?
context: During the divestment from South Africa movement in the late 1980s, student activists erected a symbolic shantytown on Harvard Yard and blockaded a speech given by South African Vice Consul Duke Kent-Brown. The Harvard Management Company repeatedly refused to divest, stating that operating expenses must not be subject to financially unrealistic strictures or carping by the unsophisticated or by special interest groups. However, the university did eventually reduce its South African holdings by $230 million (out of $400 million) in response to the pressure.
None