TASK DEFINITION: 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:`.
PROBLEM: 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  <sep> FOLLOWUP_Q: Who'se phone did Walter use to call Lydia?

SOLUTION: No

PROBLEM: CONTEXT: He's talking about the stress of the job. It's a common "joke" (though not really funny when you consider recent suicide rates) that is based on either suicide or stress. "I'm not sure what's going to kill me first, the stress from these people or the stress from this job" "I'm not sure what's going to make me kill myself first, dealing with these people or dealing with this job" Sam is essentially saying, "I always knew somehow this train would be the death of me." It's not really clear whether he was saying it in jest or if he truly believed it, but that's essentially what that quote means.  <sep>  Q: What is the meaning of Sam's words?

SOLUTION: Yes

PROBLEM: CONTEXT: There is no published in or out of universe explanation about Guinan/her people and Q/the Q. It was never expanded on in the show, movies, in canon or non-canon books or video games, or any of the released production notes or interviews. Given how extensive the information we have about TNG and star trek in general, compared to other shows, that's very telling. Production must not want it to be known. It was a plot point that was abandoned and never brought up again in any shape or form. It almost makes it a discontinuity.  <sep>  Q: What was the prior relationship between Q and Guinan? A: There is no published in or out of universe explanation about Guinan/her people and Q/the Q  Q: Was Guinan's true identity every revealed? A: It was a plot point that was abandoned and never brought up again in any shape or form. It almost makes it a discontinuity  Q: So, were they originally intending for Guinan to have a certain back-story? A: Given how extensive the information we have about TNG and star trek in general, compared to other shows, that's very telling. Production must not want it to be known  <sep> FOLLOWUP_Q: Oh, I see, so TNG is The Next Generation?

SOLUTION:
Yes