/// <summary>
/// Processes a Subquery
/// </summary>
/// <param name="subquery">Subquery</param>
/// <param name="context">SPARQL Evaluation Context</param>
/// <returns></returns>
public virtual BaseMultiset ProcessSubQuery(SubQuery subquery, SparqlEvaluationContext context)
{
if (context == null)
{
context = this.GetContext();
}
return(subquery.Evaluate(context));
}