term extraction

term_extract.rb

  def term_extract
    p4 = phrases(4)
    p3 = phrases(3)
    p3_delete_list = []
    p4_keys = p4.keys
    p3_keys = p3.keys
    p4_keys.each do |pkey|
      p3_keys.each do |check_key|
        if pkey.include?(check_key)
          p3_delete_list << check_key
        end
      end
    end
    p3.delete(p3_delete_list)
    [p4, p3]
  end