It was almost midnight and much of Seville was heading to bed. Yet a crowd had gathered in front of a stage on the bank of the Guadalquivir River, beside the bridge connecting the Spanish city's center with a neighborhood famous for its flamenco music.
The night was heavy with late-summer heat, and audience members fanned themselves as the musicians took their places. Then Fabiola Pérez let out a prolonged “Aaayyy!” that traveled across the water.
