module Werd
  class PosFilter
    include Contracts

    Contract WordList => WordList
    def self.filter(wordlist)
      pos = Moby::PartsOfSpeech.new
      wordlist.select do |row|
        word = pos.find(row.first)[:pos]
        next(false) if word.include?(:pronoun)
        next(false) if word.include?(:definite_article)
        next(false) if word.include?(:preposition)
        next(false) if word.include?(:conjunction)
        next(false) if word.include?(:verb_usu_participle)
        true
      end
    end
  end
end