So for researchers still use prototype 2 water from prototype 1 used in experiments but add to knowledge, agents have already tried drinking again and asked an opinion.
So for prototype 2 were still using water from prototype 1 used in the experiment. But add to that knowledge before the agent tried to drink again. Asked for a comment
So for prototype 2 researchers still use the water from the prototype 1 used in the experiment. But the increase of knowledge before representative tried to drink again and ask your opinion.