Now three years old , Language Log , at itre.cis.upenn.edu/myl/languagelog , attracts 5,000 daily visitors and is now partly captured in a book , '' Far from the Madding Gerund '' -LRB- William , James & Co. -RRB- , which reprints some posts by Language Log 's founders , Mark Liberman , a linguist at the University of Pennsylvania , and Geoff Pullum , a linguist at the University of California , Santa Cruz .