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 ":".
His
interest
in
photography
started
in
the
military
,
picking
it
up
as
a
hobby
before
receiving
an
honorable
discharge
in
April
1986
.
His:O
interest:O
in:O
photography:O
started:O
in:O
the:O
military:O
,:O
picking:O
it:O
up:O
as:O
a:O
hobby:O
before:O
receiving:O
an:O
honorable:O
discharge:O
in:O
April:O
1986:O
.:O