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<Paper uid="W98-1411">
  <Title>EXPERIMENTS USING STOCHASTIC SEARCH FOR TEXT PLANNING</Title>
  <Section position="6" start_page="103" end_page="105" type="evalu">
    <SectionTitle>
6.3 Results
</SectionTitle>
    <Paragraph position="0"> * Figure 4 shows an example text produced using the path encoding operations (for j-342540, after 2000 iterations, just under 2 minutes, score I80). The same remarks about hand editing apply as before. Figure 5 summarises the results for subtree swapping and the two genetic algorithms on a set of examples. These results summarise the mean and standard deviations of the scores of the system run 10 times. The system was tried with a limit of 2000 and 4000 *iterations around the main loop of the algorithm. These took about 2 and 4 minutes respectively. With each example problem we have specified the number of facts, the number of elaboration relations and the number of non-elaboration relations. Note that there is not a very clear basis for comparison between  This jewel/is made from diamonds and yellow metals.</Paragraph>
    <Paragraph position="1"> It/was made by Flockinger, who was an *English designer.</Paragraph>
    <Paragraph position="2"> * Flockinger lived in London, which is a city.</Paragraph>
    <Paragraph position="3"> This jeweli was made in London.</Paragraph>
    <Paragraph position="4"> It/is a necklace.</Paragraph>
    <Paragraph position="5"> Iti is made from oxidized white metal, pearls and opals.</Paragraph>
    <Paragraph position="6"> It/is set with jewels.</Paragraph>
    <Paragraph position="7"> This jewel/ is encrusted with jewels: it/ has silver links encrusted asymetrically with pearls and diamonds. This jewel/was made in 1976.</Paragraph>
    <Paragraph position="8"> Iti is an Organic style jewel and is 72.0 cm long.</Paragraph>
    <Paragraph position="9"> Iti draws on natural themes for inspiration: it/ uses natural pearls. Indeed, Organic style jewels usually draw on natural themes for inspiration.</Paragraph>
    <Paragraph position="10"> Organic style jewels usually have * a coarse texture, are usually made up of asymmetrical * shapes and are usually encrusted with jewels.</Paragraph>
    <Paragraph position="11"> The * previous jewelj is encrusted With jewels: itj features diamonds encrusted on a natural shell.</Paragraph>
    <Paragraph position="12"> . Itj has little diamonds scattered around its edgesand an encrusted bezel.  since iterations take roughly the same amount of time one can get a rough idea of the relative performance.</Paragraph>
    <Paragraph position="13"> The *example text is now in a single paragraph, with a clear link from each sentence to the * previous ones. From the numerical results, one can see that there is imuch less variability than before. This is mainly because the rigid tree-building constraints prevent really bad trees * being built and so the worst results are less bad. The results are also significantly better than for subtree swapping, with the edge-sensitive representation clearly winning. *</Paragraph>
  </Section>
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