 Complete the following phrase:  In this way Sazo would become the leading voice of the group as well as in charge of the lyrics. El Congreso would be the first album that the group would record. Sazo would be in charge of the lyrics that would be marked by the pacifist cut typical of the hippie subculture that marked the group in its beginnings. With Sazo as lyricist and singer, and Tilo González as composer and drummer, one of the most important creative pairs in the history of Chilean music would be formed. Due to the 