premise: Maria Severa Onofriana (July 26, 1820November 30, 1846), also known simply as A Severa, is regarded as the first fado singer to have risen to fame, attaining a near-mythical status after her death. Fado has been described as the Portuguese expression of 'the blues,' and fado roughly means fate.
hypothesis: She died at 26 years old.
reason: her birthday is July 26, 1820 and death date of November 30 1846, which would make her 26 years old at the time of death