PREFIX era:
SELECT DISTINCT *
{
GRAPH {
?sol a era:SectionOfLine.
?sol era:opStart ?op_start.
?op_start era:opName ?op_startName .
?sol era:opEnd ?op_end.
?op_end era:opName ?op_endName .
FILTER (regex(?op_startName,"Dendermonde")) .
FILTER (regex(?op_endName,"Zele")).
?sol era:track ?track .
?track era:wheelSetGauge ?wheelSetGauge .
}
}