text: Guardiola was Messi's mentor from 2008 to 2012, winning two Champions League titles in 2009 and 2011?
classes:  No, under Guardiola, Messi could not win a league title.  Besides, under Guardiola, Messi could not win a league title.  Yes, under Guardiola, Messi could not win a league title.  Meanwhile, under Guardiola, Messi could not win a league title.