Art heist

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Across
  1. 2. The retriever of Labrador
  2. 5. children's playground structure
  3. 6. the month of Thanksgiving
  4. 8. the dark half of a global rotation
Down
  1. 1. a repository of of art or history
  2. 3. a grouch or a reward
  3. 4. the middle of a line or circle
  4. 7. repeating resonating sound