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 ":".
This
was
perhaps
the
most
important
research
of
her
career
.
This:O
was:O
perhaps:O
the:O
most:O
important:O
research:O
of:O
her:O
career:O
.:O