Complex sentence: Hassani was a supporter of the Mujahadeen, as of 1988, following the execution of her uncle in Iran, among a group of an estimated 35,000 dissidents executed at that time.
Split into simpler sentences: Hassani was a supporter of the Mujahadeen, as of 1988, following the execution of her uncle in Iran. Her uncle was among a group of an estimated 35,000 dissidents executed at that time.