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<Paper uid="C86-1040">
  <Title>The Role of Inversion and PP-Fronting In Relating Discourse Elements: some implications for cognitive and computational models of Natural Language Processing</Title>
  <Section position="6" start_page="172" end_page="172" type="evalu">
    <SectionTitle>
5. Results
</SectionTitle>
    <Paragraph position="0"> In pilot experiments tile DRS list was allowcd to have complex structure, In other words, the DRS list was a lists of lists (of lists, ete). The label list on the other baad was flat, i.e. a list of lists. The processing in the case of the complex structure was speeded up by a factor of 3, overall, when the heuristic was applied at all times (in the third program). In the case of the second program only the processing of the non-SVO sentences, the last sentence in the corpus were sped up.</Paragraph>
    <Paragraph position="1"> However in subsequent experiments the DRS lists were all converted into flat lists. The effect was less dramatic but significant none the less. Below is given two tables of the figures for all 3 runs. The first table is the time each program took for processing the non-SVO sentence, i.e. the last sentence in the corpus and the time it took to process the  All times. J I 8The times given iu table 1 are rounded to tile nearest thousandth of a second. Ilowevcr all percentages were computed with original microsecond numbers and then rounded.</Paragraph>
    <Paragraph position="2">  It is obvious from tile above table thaC always searching the label list(s) is far superior to searching tile larger discourse struetm'es. I~ is also significant that whm, the heuristic (searching ~he label li,'.;t) is only applied l.o Non-SVO struetui'es~ i.e. tile fast senl, enee of the eo,'pl,s~ t;ll,'~b tilt., spee(1 up is significaa,t. (The difference between the second a,ld third program wil, h respect to I, hc last sentence, the non-.SVO sentence is not significant and i~; due to nlaehine rel;~t.ed factors.) The,'efore it seems that it is worthwhile buih\[ing a separate list of NPs and searching that list; for at; least resolving a.naphora and using it not only for the (linguistically) motivated non.4~VO structure search but all the time azs well.</Paragraph>
  </Section>
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