A set of tuples grouped by an overarching condition (predicate). This set can be modelled
in a variety of ways, including as Records grouped by Tables operated on by the SQL Query
Language that's supported by a majority of Relational Database Management systems; or as
Sentences (or Statements) grouped by Sentence Predicate (depictable as Graphs) operated on
by the SPARQL Query Language supported by a majority of RDF-compliant Relational
Database Management Systems and Triple- or Quad-stores.