With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
It
was
discovered
on
March
24
,
2012
by
the
Catalina
Sky
Survey
.
It:O
was:O
discovered:O
on:O
March:O
24:O
,:O
2012:O
by:O
the:O
Catalina:product-other
Sky:product-other
Survey:product-other
.:O