Chapter 4-1-3: A pronoun should not refer to adjectives or possessive nouns
You should not use adjectives, or nouns or pronouns in the possessive case, as antecedents. Although they may imply a noun, reference to them will be ambiguous:
In Ruth's apology she told Jerry she'd loved him for years.
In this case, the pronoun "she" seems to refer to the noun phrase "Ruth's apology," though it was probably meant to refer to possessive noun "Ruth's."
Jerry wore those blasted green pants; it was his favourite colour.
In this example, the pronoun "it" seems to refer to the noun "pants," though it was probably meant to refer to the adjective "green."