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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def record_affiliations(self, key, value):
 """Populate the ``record_affiliations`` key."""

    record = get_record_ref(value.get('z'), 'institutions')

    return {
        'curated_relation': record is not None,
        'record': record,
        'value': value.get('a'),
    }