With no explanation, label each line with "O", "location-island", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Davidson
performed
several
staff
and
command
roles
in
2nd
Battalion
,
23rd
Marines
,
and
served
with
this
unit
throughout
combat
operations
against
Roi-Namur
in
the
Battle
of
Kwajalein
in
the
Marshall
Islands
(
January
31
–
February
3
,
1944
)
.
Davidson:O
performed:O
several:O
staff:O
and:O
command:O
roles:O
in:O
2nd:O
Battalion:O
,:O
23rd:O
Marines:O
,:O
and:O
served:O
with:O
this:O
unit:O
throughout:O
combat:O
operations:O
against:O
Roi-Namur:location-island
in:O
the:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
Kwajalein:event-attack/battle/war/militaryconflict
in:O
the:O
Marshall:location-island
Islands:location-island
(:O
January:O
31:O
–:O
February:O
3:O
,:O
1944:O
):O
.:O