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 ":".
They
were
retired
in
May
2020
.
They:O
were:O
retired:O
in:O
May:O
2020:O
.:O