Revising vague use of it, this, that, and which

Writers often use it, this, that, or which as a shortcut for referring to something mentioned earlier. But such shortcuts can cause confusion. Make sure that these pronouns refer clearly to a specific antecedent.

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If a that or which clause refers to a specific noun, put the clause directly after the noun, if possible.

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Does that refer to the float or the parade? The editing here makes the meaning clear.