['doctor', 'explain', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PERSON>1', 'indicate-78', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
The Doctor explains, so it is the primary source of imagery for his hallucinations.
<PERSON>1 explains, so <PRP> is <PERSON>1 Synset('primary.a.01') Synset('location.n.01') of Synset('basic_cognitive_process.n.01') for <PRP> Synset('psychological_state.n.01').