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The ambiguity arises because you have one sentence doing three jobs. It is telling us which city Jessica lives in, where that city is, and what the unemployment rate is. The simple fix is to split the sentence, repeating "Halifax"

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia. In Halifax, the unemployment rate is five percent.

Jessica lives in the city of Halifax, where the unemployment rate is five percent. (do you need to say that Halifax is in Nova Scotia?)

Another way is to indicate a context in other sentences:

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia, where the unemployment rate is five percent. This compares well with other Canadian cities. In Ontario, the rate is ten percent. However in the rest of Nova Scotia the unemployment rate is only two percent...

The ambiguity arises because you have one sentence doing three jobs. It is telling us which city Jessica lives in, where that city is, and what the unemployment rate is. The simple fix is to split the sentence, repeating "Halifax"

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia. In Halifax, the unemployment rate is five percent.

Jessica lives in the city of Halifax, where the unemployment rate is five percent. (do you need to say that Halifax is in Nova Scotia?)

Another way is to indicate a context in other sentences:

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia, where the unemployment rate is five percent. This compares well with other Canadian cities. In Ontario, the rate is ten percent.

The ambiguity arises because you have one sentence doing three jobs. It is telling us which city Jessica lives in, where that city is, and what the unemployment rate is. The simple fix is to split the sentence, repeating "Halifax"

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia. In Halifax, the unemployment rate is five percent.

Jessica lives in the city of Halifax, where the unemployment rate is five percent. (do you need to say that Halifax is in Nova Scotia?)

Another way is to indicate a context in other sentences:

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia, where the unemployment rate is five percent. This compares well with other Canadian cities. In Ontario, the rate is ten percent. However in the rest of Nova Scotia the unemployment rate is only two percent...

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source | link

The ambiguity arises because you have one sentence doing three jobs. It is telling us which city Jessica lives in, where that city is, and what the unemployment rate is. The simple fix is to split the sentence, repeating "Halifax"

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia. In Halifax, the unemployment rate is five percent.

Jessica lives in the city of Halifax, where the unemployment rate is five percent. (do you need to say that Halifax is in Nova Scotia?)

Another way is to indicate a context in other sentences:

Jessica lives in the city of Halifax, the capital of the province of Nova Scotia, where the unemployment rate is five percent. This compares well with other Canadian cities. In Ontario, the rate is ten percent.