Brigand's parent node is a Noun Phrase (NP) node which in turn comes from the root of the tree, the Sentence node S. We assign to each phrase chunk an identifier (22 and 97 in this case) in order to distinguish them according to their building elements as specified by the grammar rule used.
a phrase chunk, e.g., a NP, a Verbal Phrase (VP), a Prepositional Phrase (PP), or other chunk defined by the grammar in CoreNLP, may be built from different types of PoS tags.