Question: How many Grammy awards has the band for which Fher Olvera is the lead singer won?

Related documents: [0]  [DOC] José Fernando Emilio "Fher" Olvera Sierra, was born in December 8, 1959, (Guadalajara, Jalisco, Mexico). He is the secondary guitarist, composer, and lead singer for the Mexican rock band Maná, the most successful Latin American band of all time with over 40 million albums sold worldwide. [END] 
[1]  [DOC] Maná (Spanish: "manna") is a Mexican Rock music band from Guadalajara, Jalisco. The group's current line-up consists of vocalist/guitarist Fher Olvera, drummer Alex González, guitarist Sergio Vallín, and bassist Juan Calleros. Maná has earned four Grammy Awards, eight Latin Grammy Awards, five MTV Video Music Awards Latin America, six Premios Juventud awards, nineteen Billboard Latin Music Awards and fifteen Premios Lo Nuestro awards. It is considered by many as the most influential and successful Latin American band of all time with over 40 million albums sold worldwide. [END]  
Answer: four
four