With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Dr
.
Sengupta
was
also
associated
with
politics
for
some
time
.
Dr:O
.:O
Sengupta:person-politician
was:O
also:O
associated:O
with:O
politics:O
for:O
some:O
time:O
.:O