Complex sentence: On 27th of February, 2015, four inmates made an attempt to escape the Gilgit district jail; during which two managed to flee, including one who was allegedly involved in the Nanga Parbat tourist shooting incident.
Split into simpler sentences: On 27th of February, 2015, four inmates made an attempt to escape the Gilgit district jail. Of the two who managed to flee, one was allegedly involved in the Nanga Parbat tourist shooting incident.