Complex sentence: Sahana has been presented at numerous conferences, workshops, and events, andhad has one paper accepted for an international conference; a paper on Sahana and Disaster Management was accepted for the 2nd International Conference on Information and Automation 2006.
Split into simpler sentences: Sahana has been presented at numerous conferences/workshops/events and already has one paper accepted for an international conference. A paper on Sahana and Disaster Management was accepted for the 2nd International Conference on Information and Automation 2006.