With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
When
he
approached
Ambika
,
she
closed
her
eyes
in
fear
.
When:O
he:O
approached:O
Ambika:person-other
,:O
she:O
closed:O
her:O
eyes:O
in:O
fear:O
.:O