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my $text = qq("Researchers from the University of Minnesota's Institut
+e on the Environment looked at 17 key crops that produce 86 percent o
+f the world crop calories.);

...
    ['q' => "select * from contentanalysis.analyze where text='".$text
+."'"]
);
print $response->content();

<?xml version="1.0" encoding="UTF-8"?>
<error xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" yahoo:lang="
+en-US"><description>Query syntax error(s) [line 1:96 missing EOF at '
+s']</description></error>

<?xml version="1.0" encoding="UTF-8"?>
<query xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" yahoo:count=
+"0" yahoo:created="2014-07-19T19:41:26Z" yahoo:lang="en-US"><results/
+></query><!-- total: 177 -->
<!-- engine4.yql.ne1.yahoo.com -->