With no explanation, label each line with "O", "other-astronomything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
an
effort
closer
to
home
,
he
also
studies
near-
Earth
asteroids
to
try
to
understand
more
about
these
potentially
dangerous
solar
system
neighbors
.
In:O
an:O
effort:O
closer:O
to:O
home:O
,:O
he:O
also:O
studies:O
near-:O
Earth:other-astronomything
asteroids:O
to:O
try:O
to:O
understand:O
more:O
about:O
these:O
potentially:O
dangerous:O
solar:other-astronomything
system:other-astronomything
neighbors:O
.:O