With no explanation, label each line with "product-airplane", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Both
post-
''
Columbia
``
Return
to
Flight
missions
experimented
with
various
repair
materials
and
techniques
,
and
the
STS-118
crew
has
trained
for
those
procedures
.
Both:O
post-:O
'':O
Columbia:product-airplane
``:O
Return:O
to:O
Flight:O
missions:O
experimented:O
with:O
various:O
repair:O
materials:O
and:O
techniques:O
,:O
and:O
the:O
STS-118:product-airplane
crew:O
has:O
trained:O
for:O
those:O
procedures:O
.:O