Premise: The Instituto Ayrton Senna (English: Ayrton Senna Institute; abbreviated IAS) is a Brazilian non-governmental organization founded by Ayrton Senna's family in November 1994, six months after Senna's death. It is presided by Viviane Senna da Silva Lalli, Ayrton's sister and mother of Formula One driver Bruno Senna.
Hypothesis: Ayrton Senna died of cancer.