With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
area
around
the
quarry
was
declared
a
national
monument
on
October
4
,
1915
.
The:O
area:O
around:O
the:O
quarry:O
was:O
declared:O
a:O
national:O
monument:O
on:O
October:O
4:O
,:O
1915:O
.:O