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Operators |
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| n | An
alternative: |
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| �boundary
dispute� AND Canada AND (US OR |
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| �U.S.�
OR �United States�) |
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| n | Another
possibility: |
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| �boundary
dispute� AND (Canad* NEAR (US OR |
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| �U.S.�
OR �United States�)) |
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| w | But
use caution � nesting is very powerful |
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| but
an easy place to make mistakes |
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