def examples
      @doc ||= Nokogiri::HTML(open(PREFIX + CGI::escape(@word)))
      @example_results ||= @doc.css('.exsentences').map{ |x| x.text.strip }.reject(&:empty?).flatten
      @example_results #to prevent above computations on repeated call on object
    end
def examples
      @doc ||= Nokogiri::HTML(open(PREFIX + CGI::escape(@word)))
      @example_results ||= @doc.css('.exsentences').map{ |x| x.text.strip }.reject(&:empty?).flatten
      @example_results #to prevent above computations on repeated call on object
    end
Fetches and gives the examples for the word
 @example
    word.examples
    #=> ["There is an easy answer to this question, and it involves some good news and  some bad news.",
         "Then there was an awkward silence as though they were waiting for me to answer  another question.",..]
 @return [Array] containing the examples.