Google Maps Directions (Routing), by Bike

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gdb
Examples: 
gdb brandenburger tor, potsdamer platz
Get a route Brandenburger Tor to Potsdamer Platz, Berlin, by bike
URL: 
https://www.google.com/maps/dir/?api=1&origin={%start|type=city}&destination={%destination|type=city}&travelmode= bicycling