With no explanation, label each line with "product-airplane", "O", "other-currency", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
the
early
1960s
the
airport
offered
flying
lessons
for
$
12
an
hour
,
using
circa
1939
Aeronca
Champs
as
trainers
.
In:O
the:O
early:O
1960s:O
the:O
airport:O
offered:O
flying:O
lessons:O
for:O
$:other-currency
12:O
an:O
hour:O
,:O
using:O
circa:O
1939:product-airplane
Aeronca:product-airplane
Champs:product-airplane
as:O
trainers:O
.:O