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$ perl -MXML::LibXML -e '
my $dom = XML::LibXML->load_xml(string => shift);
print $_->to_literal(),"\n"  for 
       $dom->findnodes("/collection/document/*/text"),;
'  "<collection><document><title><text> Hello how are you</text></titl
+e></document><document><abstract><text>I am fine</text></abstract></d
+ocument></collection>"

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```
 Hello how are you
I am fine
```