Some articles on siuran:

Nino Bravo - Singing
... While Bravo was away in the military, López befriended Miguel Siuran, a radio personality, who was impressed by Los Superson's sound and wanted to help them get a recording contract, and wanted to include ... enthusiastically about the contract, however Siuran scornfully asked if Bravo could sing like Tom Jones, Engelbert Humperdinck or John Rowles ... Once Siuran heard Bravo's voice, however, the radio man was deeply impressed ...