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 ":".
In
1863
he
received
his
habilitation
,
and
in
1873
became
an
associate
professor
.
In:O
1863:O
he:O
received:O
his:O
habilitation:O
,:O
and:O
in:O
1873:O
became:O
an:O
associate:O
professor:O
.:O