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The query for test case K2-SeqUnion-45 was changed in response to Bug #8655. I believe that the expected result now needs to change from: <r><location>Denver</location><location>Denver</location><location>Denver</location></r> to: <r><location>Denver</location><location>Denver</location><location>Denver</location><location>Boston</location></r>
I agree, and I have taken the liberty of fixing the expected results.