Otherwise, it is a fragment. Fragments are sometimes used in feature writing for effect, but not in straight, journalistic style. But not in the case of Kimberly W. Green. Green is, not Green are. Also, stay in the same tense within a story, and certainly within a sentence.
Antecedents are the nouns or pronouns to which the pronoun refers.
Sentences that begin with the pronoun it are particularly suspect. The closest preceding noun is usually the antecedent. Don t make readers jump over nouns to find the correct antecedent. Couple is another word that be plural or singular depending on construction. This is not an exhaustive list of types of clauses, but does deal with those most-often encountered in journalistic writing.