Complex sentence: "Revivals" from cryogenic stasis are largely ignored and left to fend for themselves on the streets, and people almost never visit the cultural "Reservations" which were established for the sole purpose of preserving past civilizations.
Split into simpler sentences: Revivals from cryogenic stasis are largely ignored and left to fend for themselves on the streets. Cultural "Reservations" are established for the sole purpose of preserving past civilizations.