Complex sentence: The Israeli Government stated "While these warnings, could not eliminate all harm to civilians, they were frequently effective," and that aerial video surveillance by IDF forces showed civilians departing from targeted areas prior to an attack as a direct result of the warnings.
Split into simpler sentences: The Israeli Government stated "While these warnings, could not eliminate all harm to civilians, they were frequently effective". It stated that aerial video surveillance by IDF forces showed civilians departing from targeted areas prior to an attack, as a direct result of the warnings.