['baby', 'respond', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
["Synset('relative.n.01')", 'respond-113', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
It's the melody not the words that the baby responds to.
It's the <PERSON>11 not the Synset('part.n.01') that the Synset('relative.n.01') responds to.