/usr/ is in php-symfony-yaml 1.0.6-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/
/usr/share/php/.registry/
/usr/share/
/usr/share/php/.registry/.channel.pear.symfony-project.com/
/usr/share/php/.registry/.channel.pear.symfony-project.com/yaml.reg
/usr/share/php/SymfonyComponents/
/usr/share/php/SymfonyComponents/YAML/
/usr/share/php/SymfonyComponents/YAML/sfYaml.php
/usr/share/php/SymfonyComponents/YAML/sfYamlParser.php
/usr/share/php/SymfonyComponents/YAML/sfYamlDumper.php
/usr/share/php/SymfonyComponents/YAML/sfYamlInline.php
/usr/share/doc/
/usr/share/doc/php-symfony-yaml/
/usr/share/doc/php-symfony-yaml/copyright
/usr/share/doc/php-symfony-yaml/YAML/
/usr/share/doc/php-symfony-yaml/YAML/README.markdown
/usr/share/doc/php-symfony-yaml/changelog.Debian.gz
/usr/share/doc/php-symfony-yaml/package.xml.gz