Complex sentence: It may also include a subset of bands that were part of, or were influenced by, the San Francisco Sound, along with early hard rock, heavy metal, and proto-metal, as acid rock influenced and later evolved into those genres.
Split into simpler sentences: It may also include a subset of bands that were part of, or were influenced by, the San Francisco Sound. The term may include early hard rock, heavy metal, and proto-metal, as acid rock influenced and later evolved into those genres.