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 ":".
At
it
was
long
enough
to
accommodate
the
Belle
steamers
that
carried
trippers
along
the
coast
at
that
time
.
At:O
it:O
was:O
long:O
enough:O
to:O
accommodate:O
the:O
Belle:product-ship
steamers:O
that:O
carried:O
trippers:O
along:O
the:O
coast:O
at:O
that:O
time:O
.:O