Complex sentence: Although eventually the award had been reviewed and approved, Zeigarnik could not gain the right to go out of the country and retrieve the award, and in 1988,5 years after being nominated, she died before ever receiving it.
Split into simpler sentences: Although eventually the award had been reviewed and approved, Zeigarnik was not allowed to travel outside of the country to retrieve the award. In 1988,5 years after being nominated, she died before ever receiving it.