Complex sentence: Kiev branch of APN agreed to permit him the use of their photographic development labs, which became a temporary abode, for around 5 years, after which he was employed as war reporter for Novosti.
Split into simpler sentences: Kiev branch of APN agreed to permit him the use of their photographic development labs. The labs became his temporary abode for around 5 years after which he was employed as war reporter for Novosti.