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 ":".
It
was
first
detected
on
January
21st
,
2019
,
and
reached
peak
brightness
on
March
4th
.
It:O
was:O
first:O
detected:O
on:O
January:O
21st:O
,:O
2019:O
,:O
and:O
reached:O
peak:O
brightness:O
on:O
March:O
4th:O
.:O