I want to know the answer to the following question:
When did The Mamas make their debut?
All the background I'm provided with is that "The band have supported Beyoncé in most subsequent live performances, including her 2007 concert tour The Beyoncé Experience, 2009–2010 I Am... World Tour and 2013–2014 The Mrs. Carter Show World Tour.". Is that enough to answer the question?
Answer: no