Question: The L. B. Day Amphitheatre, is an outdoor concert venue in Salem, Oregon, United States, within the Oregon State Fairgrounds, bands and performers that have played at the venue include which American rock band from the suburbs of Philadelphia, Pennsylvania?
Sentence (from "Cinderella (band)"): Cinderella had a heavy metal sound initially before shifting to a more hard rock/blues rock sound.
Relevant evidence: No