M1/12 distinguish

[martyn-meister]

A really odd issue I know but here's the thing, from U Eberswalder Str. the M1 and 12 both go to "Mitte, am Kupfergraben" (not right at the minute because of construction works, but normally) one goes to Hackesher Markt directly, the other via Nordbahnhof, Naturkundemuseum etc.

I need to be able to distinguish these but the yaml doesn't really allow me to.

Could we maybe add a filter for line/number, as this is in the response json?