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
Flats
run
adjacent
to
three
Pittsburgh
neighborhoods
across
the
Monongahela
River
and
are
directly
linked
via
bridges
.
The:O
Flats:O
run:O
adjacent:O
to:O
three:O
Pittsburgh:location-GPE
neighborhoods:O
across:O
the:O
Monongahela:location-bodiesofwater
River:location-bodiesofwater
and:O
are:O
directly:O
linked:O
via:O
bridges:O
.:O