Complex sentence: Safian also argues that the Fourth Geneva Convention does not apply to Palestinian refugees because the convention was adopted two years after the 1948 Palestinian exodus, and thus not international law at the time it took place.
Split into simpler sentences: Safian also argues that the Fourth Geneva Convention does not apply to Palestinian refugees. However, this convention was adopted two years after the 1948 Palestinian exodus, and thus not international law at the time the exodus took place.