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 ":".
The
company
's
generation
portfolio
comprises
coal-fired
power
stations
.
The:O
company:O
's:O
generation:O
portfolio:O
comprises:O
coal-fired:O
power:O
stations:O
.:O