"This study did not give a gold-standard for shape clustering (though it could be difficult)." "['con', 'con', 'con', 'con', 'con', 'con', 'con', 'con', 'con', 'con', 'con', 'con', 'non', 'non', 'non', 'non', 'non', 'non', 'non', 'non']" "paper quality"