Is 1 Noun Worth 2 Adjectives ?

Are two adjectives worth the same as a single noun when documents are ordered based on decreasing topicality? We propose an easy to interpret single number Relative Feature Utility (RFU) measure of the relative worth of using specific linguistic or non-linguistic features or sets of features in computational systems that order or filter media, such as information retrieval and classification systems. This measure allows one to make easily interpreted claims about the relative utility of features such as parts-of-speech, term suffixes, phrases vs. single terms, annotations, hyperlinks, citations,