Midterm2010_solution

The

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Unformatted text preview: search
for
“puppies”.
After
examining
enough
such
searches
the
search
 engine
will
learn
that
“puppies”
is
related
to
“dogs.”
 3. Another
useful
signal
is
what
bi‐grams
(tri‐grams,
etc)
exist
in
a
query,
or
in
the
text
of
a
 webpage.
For
example,
Google
can
interpret
the
query
“new
york
times”
as
consisting
of
a
 single
group
of
words
that
go
together.

However,
“new
york
times
square”
should
be
 interpreted
as
two
groups
of
words
“new
york”
and
“times
square,”
thus
sparing
the
user
 articles
about
squares
printed
in
The
New
York
Times.

 Grading
policy:
 Some
people
who
did
not
read
the
article
or
who
had
trouble
recalling
its
details
began
“core‐ dumping...
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This document was uploaded on 01/24/2014.

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