['they', 'search', 'EmptyParameter', 'indication', 'for'] ['they', 'observe', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'search-35.2', 'EmptyParameter', "Synset('speech_act.n.01')", 'for'] ['<PRP>', 'sight-30.2', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
They are searching for indications of advanced rational intelligence within the species which they observe.
<PRP> are searching for Synset('speech_act.n.01') of advanced Synset('rational.a.03') Synset('operation.n.05') within the Synset('category.n.02') which <PRP> observe.