input: Text: Professor A: We're going? OK. Sh - Close your door on <unk>disfmarker<unk> door on the way out? Grad B: OK. Thanks. Professor A: Thanks. Grad B: Oh. Professor A: Yeah. Probably wanna get this other door, too. OK. So. Um. <unk>vocalsound<unk> <unk>vocalsound<unk> What are we talking about today? PhD E: Uh, well, first there are perhaps these uh Meeting Recorder digits that we tested. Professor A: Oh, yeah. That was kind of uh interesting. PhD E: So. Professor A: The <unk>disfmarker<unk> both the uh <unk>disfmarker<unk> <unk>vocalsound<unk> the SRI System and the oth PhD E: Um. Professor A: And for one thing that <unk>disfmarker<unk> that sure shows the <unk>vocalsound<unk> difference between having a lot of uh training data <unk>vocalsound<unk> or not, PhD E: Of data? Yeah. Professor A: uh, the uh <unk>disfmarker<unk> <unk>vocalsound<unk> The best kind of number we have on the English uh <unk>disfmarker<unk> on near microphone only is <unk>disfmarker<unk> is uh three or four percent. PhD E: Mm - hmm. Professor A: And uh it's significantly better than that, using fairly simple front - ends <unk>vocalsound<unk> on <unk>disfmarker<unk> <unk>vocalsound<unk> on the uh <unk>disfmarker<unk> <unk>vocalsound<unk> uh, with the SRI system. PhD E: Mm - hmm. Professor A: So I th I think that the uh <unk>disfmarker<unk> But that's <unk>disfmarker<unk> that's using uh a <unk>disfmarker<unk> a pretty huge amount of data,
  Question: What did the professor think about pronouncing zero?
  Answer:
output: The professor pointed out that zero is said in two ways, "O" and "Zero." So, when recording digits, people are told which way to pronounce it.