All lines, save to buslines.json

https://api.openstreetmap.fr/oapi/interpreter?data=[out:json];(relation[network~%22^(RGTR|Nightbus|Hop%20On%20Hop%20Off)%22](49.2,5.5,50.3,7.0);node(r)-%3E.x;way(r);node(w););out%20qt%20body;

One line, for example 195, save to 195.json
                                                                                                                                                                              ↓ ref="195" is line reference
https://api.openstreetmap.fr/oapi/interpreter?data=[out:json];(relation[network~%22^(RGTR|Nightbus|Hop%20On%20Hop%20Off)%22][%22operator%22~%22Emile%20Weber%22][%22ref%22=%22195%22](49.2,5.5,50.3,7.0);node(r)-%3E.x;way(r);node(w););out%20qt%20body;
