Complex sentence: While the ISA has not yet made a human spaceflight of its own, since the mid- 90s there has been a cooperation agreement between the Israel Space Agency and NASA which has resulted in one Israeli astronaut on a NASA mission to date.
Split into simpler sentences: While the ISA has not yet have a human spaceflight of its own. Since the mid- 90s, a cooperation agreement between the Israel Space Agency and NASA resulted in one Israeli astronaut on a NASA mission to date.