With no explanation, label each line with "O", "building-sportsfacility", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
To
support
himself
,
he
worked
at
the
Gregory
Gymnasium
two
hours
a
day
to
earn
$
30
a
month
(
approximately
$
in
present-day
terms
)
.
To:O
support:O
himself:O
,:O
he:O
worked:O
at:O
the:O
Gregory:building-sportsfacility
Gymnasium:building-sportsfacility
two:O
hours:O
a:O
day:O
to:O
earn:O
$:O
30:O
a:O
month:O
(:O
approximately:O
$:O
in:O
present-day:O
terms:O
):O
.:O