<?xml version="1.0"?>
<eressea>
<resources>
<resource name="laen" limited="yes" material="yes">
    <item weight="200" score="100">
        <construction skill="mining" minskill="7"/>
    </item>
  <modifier building="mine" type="skill" value="1"/>
  <modifier type="require" building="mine"/>
</resource>
</resources>
</eressea>