Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: How long had the Royal Opera Covent Garden been in operation when Sarah Fox made her debut as Woglinde? Passage:In 2000, Fox made her debut for the Glyndebourne Festival as Karolka (Jenufa), returning in 2002 as Zerlina (Don Giovanni) and in 2003 as Susanna (Le nozze di Figaro). Of her Susanna in Le Nozze di Figaro at the Glyndebourne Festival Barbarina Diana, writing in Il giornale della musica described her performance at Glyndebourne as "a delight for the eye and heart, whose voice, fresh and crystal clear is blessed with a rare beauty accompanied by a strong musicality: 'Deh vieni' interpreted without affectation, directed to her beloved, takes your breath away". With Glyndebourne on tour she has sung Marzelline (Fidelio) and Miss Wordsworth (Albert Herring). In 2004, she made her debut with the Royal Opera Covent Garden as Woglinde (Das Rheingold), returning to the house in 2005 as Waldvogel (Siegfried) and in 2006 as Woglinde (Götterdämmerung). In 2007 she sang Zerlina (Don Giovanni) and Woglinde (Das Rheingold and Götterdämmerung; in 2008, Lucy Lockitt in The Beggars Opera and in 2009, Asteria in Handel's "Tamerlano." Further British engagements include Ann Page (Sir John in Love) with English National Opera, Merab (Saul), Musetta and Mimi (La Bohème) with Opera North, and Servilia (La clemenza di Tito) with Welsh National Opera. At the Edinburgh Festival, her roles have included Iphis (Jephtha) and Cleofide (Poro).


b