With no explanation, label each line with "location-GPE", "O", "location-bodiesofwater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
south
end
of
the
lake
overflows
via
Mill
Brook
through
Westbrook
to
the
Presumpscot
River
at
Riverton
.
The:O
south:O
end:O
of:O
the:O
lake:O
overflows:O
via:O
Mill:location-GPE
Brook:location-GPE
through:O
Westbrook:location-GPE
to:O
the:O
Presumpscot:location-bodiesofwater
River:location-bodiesofwater
at:O
Riverton:location-GPE
.:O