def call_wordnik_api(keyword)
    start_year = 2000
    end_year = 2012 #latest
    uri = "http://api.wordnik.com/v4/word.json/#{keyword}/frequency?useCanonical=true&startYear=#{start_year}&endYear=#{end_year}&api_key=#{ENV["WORDNIK_API_KEY"]}"
    parsed_uri = URI.parse(uri)