With no explanation, label each line with "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Investigators
were
later
able
to
determine
that
the
two
aircraft
most
likely
converged
at
a
point
over
an
area
northeast
of
the
Hansen
Dam
spillway
.
Investigators:O
were:O
later:O
able:O
to:O
determine:O
that:O
the:O
two:O
aircraft:O
most:O
likely:O
converged:O
at:O
a:O
point:O
over:O
an:O
area:O
northeast:O
of:O
the:O
Hansen:location-other
Dam:location-other
spillway:location-other
.:O