With no explanation, label each line with "O", "product-ship", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Dhows
have
been
used
in
the
region
for
centuries
,
and
were
key
in
developing
thriving
fishing
,
pearl
diving
and
trade
industries
as
well
as
cultural
exchanges
.
Dhows:product-ship
have:O
been:O
used:O
in:O
the:O
region:O
for:O
centuries:O
,:O
and:O
were:O
key:O
in:O
developing:O
thriving:O
fishing:O
,:O
pearl:O
diving:O
and:O
trade:O
industries:O
as:O
well:O
as:O
cultural:O
exchanges:O
.:O