text: Guardiola was Messi's mentor from 2008 to 2012, winning two Champions League titles in 2009 and 2011?
classes:  No, a conflict ensued, which broke Guardiola and Messi's relationship.  Besides, a conflict ensued, which broke Guardiola and Messi's relationship.  Yes, a conflict ensued, which broke Guardiola and Messi's relationship.  Meanwhile, a conflict ensued, which broke Guardiola and Messi's relationship.