sentences:  It formed the first section of Van Halen OU812 Tour, the main part of which followed immediately after Monsters of Rock 1988.As one of the many well-known Monsters of Rock tours, the tour featured an impressive line-up, especially for a single-day event, and proved very popular.Being a large-scale event with multiple acts, there was a long gap between many dates when the bands' gear was transported and set up.