| 41. | They appeared to have originated in the Southwestern United States.
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| 42. | He served primarily on frontier posts in what were then the southwestern United States.
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| 43. | It is a shrub or tree native to the southwestern United States and Mexico.
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| 44. | It is native to the Southwestern United States and California.
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| 45. | The southwestern United States and California are inundated with illegals.
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| 46. | There are also Native American pictogram examples in caves of the Southwestern United States.
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| 47. | They are distributed across the southwestern United States and adjacentMexico.
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| 48. | They are native to Mexico and the southwestern United States.
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| 49. | The plant is found in the Southwestern United States.
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| 50. | Forecasters said it could generate more rain over northwestern Mexico and the southwestern United States.
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