I want to know the answer to the following question:
When did Beyonce begin her second world tour?
All the background I'm provided with is that "The album formally introduces Beyoncé's alter ego Sasha Fierce, conceived during the making of her 2003 single "Crazy in Love", selling 482,000 copies in its first week, debuting atop the Billboard 200, and giving Beyoncé her third consecutive number-one album in the US.". Is that enough to answer the question?