How to travel down nob hill on the san francisco cable cars<br>Recognize the route system of the trolley in san francisco. The cable cars (or trolleys) run on three routes. Two of these routes begin at the powell & market turntable; they both run over nob hill.
Three cable car routes travel on powell street.
At least two of the routes travel on powell street, but the third route is uncertain. I think the model automatically assumes it is wrong if it is not mentioned.
( z1 travel :ARG0 ( z2 route :quant 3 :mod ( z3 car :mod ( z4 cable ) ) ) :ARG1 ( z5 street :name ( z6 name :op "powell" :op "Street" ) ) )