Given a paragraph about movies and a set of conversational questions and answers about the paragraph, say whether the passage contains sufficient information to answer the follow-up question. Say Yes if it is answerable; otherwise, say No. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`, and the follow-up question has a prefix `FOLLOWUP_Q:`.
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Question: CONTEXT: Well, in answer to the first part: Yes, the water in which John Loomis (Chiwetel Ejiofor) was swimming/bathing when Ann Burden (Margot Robbie) came up to him is irradiated. Without getting too "spoilery", the area in which Ann lives seems to be one of very few (if not the only) radiation-free zones at the time of the story. However, the water in which John was swimming comes from outside of that area (the waterfall). As for the beneficial effects of the bath, I think the link to the "Silkwood Shower" reference by @Will-Feldman is probably as good an explanation as any. Try to get as much of the irradiated water off of the body as possible. John is obviously still going to be affected by his exposure, but there's no reason to allow more of the radiation to seep in if it can be prevented.  <sep>  Q: Why does Margot Robbie wash Chiwetel Ejiofor in Z for Zachariah? A: the water in which John was swimming comes from outside of that area (the waterfall  Q: Is there radiation in the water? A: irradiated  Q: What does irradiated mean? A: irradiated  <sep> FOLLOWUP_Q: Will scrubbing protect you from the radiation?

Answer: No


Question: CONTEXT: Ricin is extremely toxic. It has an LD50 (the lethal dose for 50% of people exposed) of 30–40mg per kilogram when ingested (its much much more dangerous when introduced to the body in other ways). Guessing Lydia's weight at around 50kg (110 lbs) would lead one to think the LD50 would be no more than 2g of ricin. It has a military-developed antidote, which has had only limited trials in humans. Ricin is a chemical subject to the Chemical Weapons Convention, in the same schedule as nerve agents Sarin and VX. (All this information gleaned from Wikipedia) Walt also only told her when she'd already begun to experience symptoms, so less likely to recover even if treated. Even if she sought attention and gave them this information it seems unlikely that she would recover. Even if she's not been given a lethal dose, survivors of ricin often suffer from long term organ damage, so she would have a pretty miserable and presumably shortened life even if she does survive. I think Walt probably weighed her slim improved chances of survival, against the pleasure of knowing that she was aware who had done this to her. I considered an answer like @Keen's too — perhaps she would not go to a hospital in fear of the attention, but I think this is less likely, even the risk averse would put fear of death above prison.  <sep>  Q: What is ricin? A: Ricin is a chemical subject to the Chemical Weapons Convention, in the same schedule as nerve agents Sarin and VX  Q: Could Lydia get medical help and survive a ricin poisoning? A: Even if she sought attention and gave them this information it seems unlikely that she would recover  Q: Did Walter want Lydia to survive? A: I think Walt probably weighed her slim improved chances of survival, against the pleasure of knowing that she was aware who had done this to her  Q: Why did Walter tell Lydia what he did to her? A: I think Walt probably weighed her slim improved chances of survival, against the pleasure of knowing that she was aware who had done this to her  <sep> FOLLOWUP_Q: Why did Walt poison Lydia with ricin?

Answer: No


Question: CONTEXT: I got the impression Weyland did not want the scientists (especially the two head scientists) to realize his selfish reason for wanting to contact the engineers. He kept them under the impression that he was funding the mission so that mankind could have the knowledge, even faking that he was already dead, the ultimate way to get credibility. If he had been honest and said "I want the engineers to help me live forever" the scientists might not have gone along as he wanted them to. (For example, David suggests Weyland wanted Elizabeth Shaw there as a good-luck charm). Remember the scene where Vickers tells the two scientists that they are not to make contact with the engineers? This is the first hint that Weyland (in the hologram) was lying. Vickers knew Weyland was alive, and knew his true goal, and did not want the scientists to interfere with that goal.  <sep>  Q: Why does Weyland hide that he was on the ship?

Answer:
Yes