Complex sentence: In an effort to end the violence and take back the community that they had worked to create, the idea was launched to start bands that played a more melodic and mid-tempo type of music, and to focus on more introspective and emotional issues.
Split into simpler sentences: In an effort to end the violence and take back the community that they had worked to create, an idea was launched. The idea was to start bands that played a more melodic and mid-tempo type of music, and to focus on more introspective and emotional issues.