Complex sentence: At the end of the 1950's an argument was introduced by Yehoshua Bar-Hillel, a researcher asked by the US government to look into machine translation to assess the possibility of "Fully Automatic High Quality Translation" by machines.
Split into simpler sentences: At the end of the 1950's an argument was introduced by Yehoshua Bar-Hillel, a researcher. They were asked by the US government to look into machine translation to assess the possibility of "Fully Automatic High Quality Translation" by machines.