Complex sentence: The San Francisco Lesbian/Gay Freedom Band (SFLGFB) is a community concert and marching band based in San Francisco that promotes visibility and musical education for the Bay Area's lesbian, gay, bisexual, transgender and intersex (GLBTI) communities.
Split into simpler sentences: The San Francisco Lesbian/Gay Freedom Band (SFLGFB) is a community-based concert and marching band in San Francisco. The band promotes visibility and musical education for the Bay Area's lesbian, gay, bisexual, transgender and intersex (GLBTI) communities.