With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Known
for
his
work
in
ophthalmology
,
he
was
instrumental
in
making
Dresden
a
center
of
ophthalmic
learning
during
his
lifetime
.
Known:O
for:O
his:O
work:O
in:O
ophthalmology:O
,:O
he:O
was:O
instrumental:O
in:O
making:O
Dresden:location-GPE
a:O
center:O
of:O
ophthalmic:O
learning:O
during:O
his:O
lifetime:O
.:O