An example Hierarchy object built from the ground up.
A hierarchy() object with
name: Chordata / rank: phylum / id: 158852
name: Vertebrata / rank: subphylum / id: 331030
name: Teleostei / rank: class / id: 161105
name: Salmonidae / rank: family / id: 161931
name: Salmo / rank: genus / id: 161994
name: Salmo salar / rank: species / id: 161996
Based on ITIS taxonomic classification
Other taxa-datasets: ex_hierarchies,
ex_hierarchy1, ex_hierarchy2,
ex_taxmap, ex_taxonomy