<?xml version="1.0" standalone="yes"?>
<Paper uid="C94-2182">
  <Title>COLLABORATION ON REFERENCE TO OBJECTS THAT ARE NOT MUTUALLY KNOWN</Title>
  <Section position="12" start_page="1121" end_page="1121" type="ackno">
    <SectionTitle>
Acknowledgments
</SectionTitle>
    <Paragraph position="0"> Our wm'k is supported by the University of'lbronto and by the Natnral Sciences and Engineering Research Council of Canada. We are gratefld to Peter Heeman, Graeme llirst, and Jeffrey Siskind for many helpful discussions.</Paragraph>
  </Section>
class="xml-element"></Paper>