An expedition might take them across 11 miles of icy water in Lake Tahoe or through the perilous currents of San Francisco Bay from Alcatraz Island to the shore .
San Francisco Bay /location/location/contains Alcatraz Island
DT NN MD VB PRP IN CD NNS IN NN NN IN NNP NNP CC IN DT JJ NNS IN NNP NNP NNP IN NNP NNP TO DT NN .
San Francisco Bay
LOCATION
Alcatraz Island
LOCATION
/location/location/contains