from
google contacts api:
<gd:extendedProperty name='pet1' value='Cat'/>
<gd:extendedProperty name='petname1' value='Zora'/>
<gd:extendedProperty name='pet2' value='Cat'/>
<gd:extendedProperty name='petname2' value='Charly'/>
<gd:extendedProperty name='pet3' value='Cat'/>
<gd:extendedProperty name='petname3' value='Lucky'/>