A table of observations and their petal length
select query that returns observations (bindings for the variable
?observation) and their colors (bindings for the variable
?petalLength), in that order.
Notice how the predicate term (i.e., the middle term) is bound to a specific IRI (
<https://triplydb.com/triply/iris/def/measure/petalLength>) that denotes the relationship between things and their depiction.