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 ":".
Bourdon
began
a
fertile
collaboration
with
his
contemporary
,
the
engineer
Claude
Verpilleux
(
1798-1875
)
.
Bourdon:person-other
began:O
a:O
fertile:O
collaboration:O
with:O
his:O
contemporary:O
,:O
the:O
engineer:O
Claude:person-other
Verpilleux:person-other
(:O
1798-1875:O
):O
.:O