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
complexity
of
biological
systems
requires
customized
care
to
sustain
their
function
.
The:O
complexity:O
of:O
biological:O
systems:O
requires:O
customized:O
care:O
to:O
sustain:O
their:O
function:O
.:O