Question: Gordon Ogilvie wrote his 1973 book over a farmer who pioneered in what field?
Sentence (from "Gordon Ogilvie"): Gordon Bryant Ogilvie, {'1': ", '2': ", '3': ", '4': "} (born 8 May 1934) is a New Zealand historian and biographer who has written over 20 books, mainly about the people, places and institutions of the Canterbury region.
Relevant evidence: No