With no explanation, label each line with "O", "building-theater", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
began
his
performing
career
playing
at
the
Teatro
San
Carlo
at
the
age
of
16
.
He:O
began:O
his:O
performing:O
career:O
playing:O
at:O
the:O
Teatro:building-theater
San:building-theater
Carlo:building-theater
at:O
the:O
age:O
of:O
16:O
.:O