In this case and many others, you repeat the subordinator (in this case "that") to avoid ambiguity. Although I agree with you in the sense that perhaps no ambiguity is possible in this sentence.
Two parallel clauses often both start with subordinators in order to remove ambiguity.
Wrong: I want to retire to a place WHERE I can relax AND I pay low taxes.
Right: I want to retire to a place WHERE I can relax AND WHERE I pay low taxes.
Without the repetition of the subordinator where, the first sentence
...
Quote:
Two parallel clauses often both start with subordinators in order to remove ambiguity.
Wrong: I want to retire to a place WHERE I can relax AND I pay low taxes.
Right: I want to retire to a place WHERE I can relax AND WHERE I pay low taxes.
Without the repetition of the subordinator where, the first sentence
...



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