Refer to the passage below and then answer the question afterwards in the same language as the passage:

Passage: In 1957, she made a state visit to the United States, where she addressed the United Nations General Assembly on behalf of the Commonwealth. On the same tour, she opened the 23rd Canadian Parliament, becoming the first monarch of Canada to open a parliamentary session. Two years later, solely in her capacity as Queen of Canada, she revisited the United States and toured Canada. In 1961, she toured Cyprus, India, Pakistan, Nepal, and Iran. On a visit to Ghana the same year, she dismissed fears for her safety, even though her host, President Kwame Nkrumah, who had replaced her as head of state, was a target for assassins. Harold Macmillan wrote, "The Queen has been absolutely determined all through ... She is impatient of the attitude towards her to treat her as ... a film star ... She has indeed 'the heart and stomach of a man' ... She loves her duty and means to be a Queen." Before her tour through parts of Quebec in 1964, the press reported extremists within the Quebec separatist movement were plotting Elizabeth's assassination. No attempt was made, but a riot did break out while she was in Montreal; the Queen's "calmness and courage in the face of the violence" was noted.Elizabeth's pregnancies with Princes Andrew and Edward, in 1959 and 1963, mark the only times she has not performed the State Opening of the British parliament during her reign. In addition to performing traditional ceremonies, she also instituted new practices. Her first royal walkabout, meeting ordinary members of the public, took place during a tour of Australia and New Zealand in 1970.

Question: What did she have the stomach of?
a man