Hijackings to Cuba became so routine that U.S. airliners began carrying approach plans for the Havana airport .
Cuba /location/location/contains Havana
Cuba /location/country/administrative_divisions Havana
Havana /location/administrative_division/country Cuba
Cuba /location/country/capital Havana
NNS TO NNP VBD RB JJ IN NNP NNS VBD VBG NN NNS IN DT NNP NN .
Cuba
LOCATION
Havana
LOCATION
/location/location/contains
Cuba
LOCATION
Havana
LOCATION
/location/country/administrative_divisions
Havana
LOCATION
Cuba
LOCATION
/location/administrative_division/country
Cuba
LOCATION
Havana
LOCATION
/location/country/capital