The task in the given question is to find the antecedents of certain pronouns. Pronouns are words we use instead of nouns and noun phrases. The noun or noun phrase instead of which we use a certain pronoun is called the pronoun's antecedent. For example:
<em>John saw Alex yesterday and greeted him.</em> - the pronoun <em>him </em>replaces the word <em>Alex</em>. <em>Alex </em>is the antecedent of <em>him</em>.
