Some buildings that were destroyed and heavily damaged in the earthquake last year were constructed in violation of the city's building code.
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ASome buildings that were destroyed and heavily damaged in the earthquake last year were
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BSome buildings that were destroyed or heavily damaged in the earthquake last year had been
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CSome buildings that the earthquake destroyed and heavily damaged last year have been
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DLast year the earthquake destroyed or heavily damaged some buildings that have been
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ELast year some of the buildings that were destroyed or heavily damaged in the earthquake had been
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