[Air-L] First occurrence of a Twitter hashtag

Hi everyone, A question for all the Twitter researchers out there: does anyone know how to find the first use of a hashtag? I came across the tool Who Tweeted It First (http://ctrlq.org/first/), but it seems to cover only very recent Tweets, and I am interested in a hashtag that has been used for several years. Thank you! Rachel Rachel Pollack Ichou Associate Programme Specialist Section for Freedom of Expression Division of Freedom of Expression and Media Development Communication and Information Sector United Nations Educational, Scientific and Cultural Organization 7, Place de Fontenoy F-75352 Paris 07 SP France Tel.: +33 (0)1 45 68 12 94 Email: r.pollack@unesco.org www.unesco.org