All you need to do is to run the following command if you want to extract the transcript in http://www.ted.com/talks/linda_liukas_a_delightful_way_to_teach_kids_about_computers/transcript?language=en.
python parser.py http://www.ted.com/talks/linda_liukas_a_delightful_way_to_teach_kids_about_computers/transcript?language=en
Then the extracted transcript will be saved as transcripts/Linda_Liukas.txt