问解析具有地理标签数据的get RSS提要

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<?xml version="1.0"?>
<rss version="2.0" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <channel>
    <title>USGS M 1+ Earthquakes</title>
    <description>Real-time, worldwide earthquake list for the past hour</description>
    <link>http://earthquake.usgs.gov/earthquakes/</link>
    <dc:publisher>U.S. Geological Survey</dc:publisher>
    <pubDate>Wed, 16 Nov 2011 11:47:10 GMT</pubDate>

    <item>
      <pubDate>Wed, 16 Nov 2011 11:41:25 GMT</pubDate>
      <title>M 1.1, Central California</title>
      <description>November 16, 2011 11:41:25 GMT</description>
      <link>http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/nc71682246.php</link>
      <geo:lat>37.5637</geo:lat>
      <geo:long>-118.8648</geo:long>
      <dc:subject>1</dc:subject>
      <dc:subject>pasthour</dc:subject>
      <dc:subject>4.60 km</dc:subject>
      <guid isPermaLink="false">nc71682246</guid>
    </item>
    <item>
      <pubDate>Wed, 16 Nov 2011 11:15:18 GMT</pubDate>
      <title>M 4.5, Kodiak Island region, Alaska</title>
      <description>November 16, 2011 11:15:18 GMT</description>
      <link>http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/ak10358657.php</link>
      <geo:lat>57.6877</geo:lat>
      <geo:long>-153.8939</geo:long>
      <dc:subject>4</dc:subject>
      <dc:subject>pasthour</dc:subject>
      <dc:subject>39.50 km</dc:subject>
      <guid isPermaLink="false">ak10358657</guid>
    </item>

  </channel>
</rss>