sentences:  They were invited to perform in the Avandaro festival in 1971, but declined the invitation due to an already very busy schedule.In that year, they took part in the Jaime Humberto Hermosillo's debut film "" (""The True Calling of Magdalena""), starring singer and actress Angélica María, which more or less seriously addresses the topics that concerned young people of the era.In the movie, a (fictional) appearance of the band with Angelica Maria (in their alter egos) at the Avandaro festival can be seen.