With no explanation, label each line with "O", "location-bodiesofwater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Alaknanda
river
is
one
of
the
main
tributaries
of
Ganga
.
Alaknanda:O
river:O
is:O
one:O
of:O
the:O
main:O
tributaries:O
of:O
Ganga:location-bodiesofwater
.:O