<value><string>python: [(\'\', \'\')] + [(x.getTitle(), x.getRelativeUrl()) for x in context.portal_catalog(portal_type=\'Campaign\', simulation_state=\'validated\')]</string></value>
<value><string>python: [(\'\', \'\')] + [(x.getTitle(), x.getRelativeUrl()) for x in context.portal_catalog(portal_type=\'Campaign\', simulation_state=\'validated\', resource_title=\'Position Announcement\')]</string></value>