Complex sentence: On 22 May 2013, the first session for collaboration of the authors of WikiShia was held and after some session of education, on June 17th, the first entry of WikiShia was published on the web.
Split into simpler sentences: On 22 May 2013, the first session for collaboration of the authors of WikiShia was held. After some session of education, on June 17th, the first entry of WikiShia was published on the web.