title: Iain Macleod
context: On 20 June 1970, two days after the Conservative Party's unexpected election victory, Macleod was appointed Chancellor of the Exchequer by the new Prime Minister, Heath.[74] Despite being in pain, he made his one and only major speech on the economy as chancellor on 7 July 1970.[1] In the speech Macleod bemoaned the high level of inflation and, at the same time, the highest level of unemployment since 1940.[51] Later that day he was rushed to hospital with what was thought at first to be appendicitis, but was in fact a Pelvic Diverticulum.[75] He was discharged 11 days later; yet at 10.30pm on 20 July, while in 11 Downing Street, he suffered a massive heart attack and died at 11.35pm.[1]
question: How did Iain Norman Macleod die?
answers: heart attack