text: import Filter from './sparql/filter';
  import Prefix from './sparql/prefix';
  import Query from './sparql/query';
  import QueryFactory from './sparql/query-factory';
  import Triple from './sparql/triple';
  import GraphPattern from './sparql/graph-pattern';
  import GroupGraphPattern from './sparql/group-graph-pattern';
  
  export {
    Filter,
    Prefix,
    Query,
    QueryFactory,
    Triple,
    GraphPattern,
    GroupGraphPattern
  }
  