With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
After
Arnolfo
died
in
1302
,
work
on
the
cathedral
slowed
for
almost
50
years
.
After:O
Arnolfo:person-other
died:O
in:O
1302:O
,:O
work:O
on:O
the:O
cathedral:O
slowed:O
for:O
almost:O
50:O
years:O
.:O